Fix 315: insert/select
Fixed #318. Was not handling VB.Net's generated expression when using nullable properties.
Updated nugets.
Formatting.
Merge branch 'pr/n319_VoiceOfWisdom'
Look for more specific version of weird vb linq expression. Fixes issue with false positive on valid c# expression.
Added tests.
Merge branch 'pr/n322_VoiceOfWisdom'

Conflicts:
	Source/Data/Linq/Builder/ExpressionBuilder.SqlBuilder.cs
Merge branch 'master' into pr/n316_Firebie
Merge branch 'master' of https://github.com/igor-tkachev/bltoolkit
Workaround for Prepare calls (issue #331 in original repository).