Add possibility in T4 use relative provider path (Support T4 in VS2012)

Add Quote support for table and column names (T4 generation)
Small fix in PostGRE assemble loading
Fixed PostgreSQL template.
Merge branch 'pr/n150_ivanoffalex'
Fixed Sybase create sql script.
Merge branch 'master' of https://github.com/igor-tkachev/bltoolkit

Conflicts:
	Tools/Templates/MySqlDataModel.generated.cs
	Tools/Templates/MySqlDataModel.tt