[GSOC]Firebird Integration Weekly Update 14

Hi all,

Progress this week:
- Some dbexception cleanup.
- Fixed ColumnLocate::findColumn implementations (for all 
  db drivers) and api definition.
- Fixed index rebuilding.
- Tried to experiment with different ICU versions, but haven't 
  managed to actually produce any errors when switching ICU 
  version (I specifically disabled index rebuilding locally as 
  to be able to catch any errors here) -- afaict. you need to 
  manually set the collation to get errors, which I suspect 
  wouldn't be done within Base.
- Fixed formatting of integers as a currency, integers now
  show as a number and not currency by default.
- Fixed segfault when setting Null as first value in 
  PreparedStatement.
- Reintroduce statement specific Mutexes (instead of a
  connection-wide Mutex).
- Implemented simple firebird unit tests to see that we can 
  really transfer a .fdb between machines with different 
  OS/CPU/bit-ness.
- Some generic cleanups.
- Tried to create a hsqldb cppunit-test, not directly usable 
  yet since hsqldb can't be run in solver (see other threads), 
  I was intending to use this as a basis for a performance test
  -- it seems I should be able to have this run for now by 
  hardcoding the classpath in the HSQLDB driver.
  (I.e. to run the unit/performance tests you need to change a
  path in the HSQLDB driver, uncomment the dbaccess Module_*.mk
  and run the test.)

Cheers,

        Andrzej