Remove hidden fields / Handle field metadata for IVOA query
Addresses issue #70
Contains following fixes:
- Remove limitations of Obscore queries in TAP/IVOA query
- Display fields for all TAP queries (Dynamically generated fields from any TAP/Obscore Query)
- Hide fields that are not used from TAP Query page / Remove empty space
- Add CSS file and minor fixes (Larger textarea for AdqlQuery, smaller width for Selected Services)
- Added label for Selected Services