add support to command 'java_callhierarchy'.
added eclim-locate-file
fix bug:compare file by chasing symbolic links.
Merge branch 'master' of github.com:jingtaozf/emacs-eclim into jingtaozf-master
fix bug:(buffer-file-name) may return null.
Merge pull request #129 from jingtaozf/master

fix bug:(buffer-file-name) may return null.
fixed various problems with eclim-locate-file
bug fix: C-u didn't trigger case insensitive search for some reason
filter out search results starting with 'jar:' or 'zip:'; that's not what we're looking for
eclim-locate-file is renamed and replaces the old eclim-file-locate fns