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

approved this merge request

mentioned in commit 1e8f80e5

merged