Cleaned up some JProgram create* methods. Moved dotify from JProgram to BuildTypeMap.

http://gwt-code-reviews.appspot.com/304801/show
Patch by: tobyr
Review by: me


git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@7867 8db76d5a-ed1c-0410-87a9-c151d255dfc7