Add postgresql prepared queries and stop relying on string formatting
for sql parameter passing
'nim i' should work again
updated xml modules
more precise word
Adds socket creation for arbitrary domain, type and protocol.
Various fixes to how the Boehm GC's interface.

The Boehm GC interface did not define the getXXXSharedMem() functions
that were needed for compilation with --threads:on. It also used
`ppointer` instead of `PPointer`, so it failed to compile with
--cs:partial.
Fixes asyncnet example.
Merge pull request #1532 from PavelVozenilek/devel

more precise word
Merge pull request #1533 from rbehrends/fix-boehmgc-interface

Various fixes to how the Boehm GC's interface.
updated SDL wrapper
updated graphics.nim
cleaned up various modules
cleaned up expat wrapper
cleaned up iup.nim
updated libcurl.nim
cleaned up openssl.nim a bit
updated pdcurses.nim
Merge branch 'bigbreak' of https://github.com/Araq/Nimrod into bigbreak
Merge branch 'devel' of https://github.com/Araq/Nimrod into bigbreak
Merge pull request #1507 from idlewan/postgresql

Add postgresql prepared queries