Fixed building of methods package

git-svn-id: http://renjin.googlecode.com/svn/trunk@690 b722d886-ae41-2056-5ac6-6db9963f4c99
Updated maven plugin to assemble sources into jar

git-svn-id: http://renjin.googlecode.com/svn/trunk@691 b722d886-ae41-2056-5ac6-6db9963f4c99
Bumps up to 0.7.0 in prep for refactoring. Globals renamed to Session. Starting work on a new package-management system based on maven

git-svn-id: http://renjin.googlecode.com/svn/trunk@692 b722d886-ae41-2056-5ac6-6db9963f4c99