BaH.TextSStream. Initial Import.

git-svn-id: http://maxmods.googlecode.com/svn/trunk@1506 b77917fb-863c-0410-9a43-030a88dac9d3
Added DataStream() method.
Added seek to end support.
Added stream file extract example.

git-svn-id: http://maxmods.googlecode.com/svn/trunk@1507 b77917fb-863c-0410-9a43-030a88dac9d3
Return correct count from ReadBytes.

git-svn-id: http://maxmods.googlecode.com/svn/trunk@1508 b77917fb-863c-0410-9a43-030a88dac9d3