Postcondition implementation for the four languages(mostly done)


git-svn-id: http://umple.googlecode.com/svn/trunk@3147 6ebf9d09-8eb1-0036-9d08-68c07d1b990a
to fix failure


git-svn-id: http://umple.googlecode.com/svn/trunk@3148 6ebf9d09-8eb1-0036-9d08-68c07d1b990a