1.0.2dev: follow-ups to r11745, adds missing `.zip` to the file name of zip download from changeset page and removed undefined `self` in `render_zip` utility function


git-svn-id: http://trac.edgewall.org/intertrac/log:/branches/1.0-stable@11780 af82e41b-90c4-0310-8c96-b1721e28e2e2
1.0.2dev: fixed failures with Babel 1.0dev when compiled catalog is missing for current locale, introduced in babel:r651

Closed #10903.


git-svn-id: http://trac.edgewall.org/intertrac/log:/branches/1.0-stable@11783 af82e41b-90c4-0310-8c96-b1721e28e2e2