Added lock around closeConnection
Fixed possible null dereference
Cleanup
No real change
Merge branch 'master' of https://github.com/fjolnir/DatabaseKit

* 'master' of https://github.com/fjolnir/DatabaseKit:
  All tests pass with postgres now
  Made makefile build static lib as well
  Cleanup
  Added postgres tests
  Fixed xcodeproj
  Makefile now works on osx
  Made things build under gnustep (still untested)
  Added makefile

Conflicts:
	DatabaseKit.xcodeproj/project.pbxproj
	DatabaseKit/Connections/DBConnectionPool.m
Cleanup
Fixed count
Added sqlite statement cache