Fixed issue #303: added support for NOT
Fixed issue #303: added support for NOT

(cherry picked from commit c2f28f6097aa565c3ca76c2ea750a740cbd2852b)

Conflicts:
	src/SQLite.cs

igrali/SQLite.Net-PCL,molinch/SQLite.Net-PCL,kreuzhofer/SQLite.Net-PCL,caseydedore/SQLite.Net-PCL,oysteinkrog/SQLite.Net-PCL,fernandovm/SQLite.Net-PCL,igrali/SQLite.Net-PCL,TiendaNube/SQLite.Net-PCL,mattleibow/SQLite.Net-PCL