- Fixed baseline selection (no longer asserts when no baselines match part of the selection, only warns)

- Removed default parameters that caused build to break on listfen. It really
  was a error, although it did not cause an error using gcc 3.4.3 on lofar17.

- Moved value checking for Strategy.RegionOfInterest to BBSKernelProcessControl.
- Fixed RegionOfInterest selection.
- Removed work domain iteration as this has to be done for the whole strategy and
  not for each step.

- Fixed a bug in getLocalDataDomain()
- Fixed a bug in readMeasurementSetMetaData()

- API change: renamed work_order to command to conform with control terminology.

- API change: added get_next_step() that gets the next work order that is also a step. It
  returns both the work order id and the attributes of the step (iface_step).

- Forgot to initialize histort ParmDB pointer in old constructor, while
  it was being freed in the destructor.

- Fixed makefiles.

- First version of separate BBSSolver executable.

- Implemented a new interface between solver and prediffer.
- Moved history logging back to the prediffer.
- Some minor code updates.

Added support for conversion of vector<string>.

Changed Correlation::Selection type from enum to string, since this simplifies
matters when interfacing with a database.

Changed Correlation::Selection type from enum to string, since this simplifies
matters when interfacing with a database.

Fixed some small documentation errors.

Moved documentation from Doxygen module "BBS" to module "BBSKernel".

Changed Correlation::Selection type from enum to string, since this simplifies
matters when interfacing with a database.

Moved util.* to pqutil.*. Added toPQstring() method.

- Previous commit was broken (I verified the built with the wrong source tree...). Should be fixed now.

- There turned out to be situation where calling decrNParents() in the destuctor of MeqExprRep on its children
  would result in an invalid read. For instance, MeqLMN has two MeqExpr attributes itsRa, itsDec. When a MeqLMN
  node is destructed, these attributes are deleted and then the destructor of the base class MeqExprRep is called.
  Now if deleted of itsRa, itsDec brings their reference count to zero, these nodes are destructed and the subsequent
  call to decrNParents from the destructor of MeqExprRep called by the destructor of MeqLMN results in an invalid
  read. The reason that a MeqExprRep can still have a link to a child that has already been destructed is that its
  child vector consists of MeqExprRep* instead of the reference counted MeqExpr. In other words, MeqExprRep::addChild()
  does not result in an increment of the reference count. This was fixed by replacing the child vector with a vector
  of MeqExpr.

- Added method getStation() needed by MeqDFTPS.cc::getLabel(), which in turn is needed
  for writing expression graphs in .dot format. Only compiled in if EXPR_GRAPH is defined.

- Implemented rudimentary handling of work domain size. Needs to be done
  differently in the next release because of the revival of the black board.

- Improved column to file mapping heuristic
- Added getMSDescriptor method because BBSKernelProcessControl needs to know
  the start/end frequency/time.

Do not crash if the connection is closed by the other end.

Debug times now not dependent on MPI.

- API change: get_step() and get_solve_arguments() now return only parset related columns.

- API change: add_step should be considered private. Always use one of add_{predict, subtract, correct, solve}_step().
  This will ensure database consistency.

- changed API: add_solve_arguments -> add_solve_step, so API ensures consistency (i.e.
  with the change it is harder to add a solve step without solve arguments.

- API change: names of the columns returned by e.g. get_step() now match the names in the parset precisely.

Indirect package dependencies will now be derived by inspecting the contents
of the directory config/<pkg-name> in the install directory for all packages
mentioned in the current configure.in file.

- Forgot to modify the call to the constructor to comply with the new constructor
  of MeqStatUVW.

- Updated MeqStatUVW so it does not use the MeqPhaseRef class that
  was only used as a container. Also, the MeqPhaseRef class contains
  a hard-coded reference to the WSRT position.

Updated copyright line.

Moved sql scripts from src to sql directory.

First few classes for the database access layer.

First few classes for the database access layer.

- Initial check in of the database side of the black board. Includes table definitions,
  triggers, and an API in the form of a collection of stored procedures.

Updated documentation.

- Changed column -> file mapping to include the name of the MS. Fixed one line that still included an itsMSName.

- Wrong input column used in this parset. Made no difference before, but after update of the MS in /opt/lofar/data it does.

- Last commit broke build. Should be fixed now.