Merge pull request #49 from dmitrii-zolotarev/master

I got the make error: src/refac_s_group.erl:3: can't find include lib "w...
fixed include.
fixed include path.
bugfix when checking meta clauses.
Updated: list of modules in ebin/wrangler.app file (fixes: rebar complains when Wrangler is added as a dependency in other projects).
Merge pull request #50 from lauramcastro/master

Updated: list of modules in ebin/wrangler.app file
fixed link to api_wrangler
Merge branch 'master' of github.com:RefactoringTools/wrangler