iOS changes

Removed NO_EXPRESSIONS compiler flag and removed SqlBuilder.cs from iOS
project.
Merge pull request #328 from sami1971/v3-fixes

iOS changes
Fixed NullReferenceException in Oracle non-parameterized update statements
Merge pull request #333 from schmidt4brains/v3-fixes

Fixed NullReferenceException in Oracle non-parameterized update statements
Merge branch 'v3-fixes' into v3