Modified makefile to not remove lib/.gitignore nor bin/.gitignore on "make clean" and on "make veryclean";
Modified .gitignore to ignore every application binary in subdirectory app/.
Solution for E6: Multiple, Specialized Heaps

git-svn-id: https://epos.lisha.ufsc.br/svn/branches/ine5424@3136 86035c5f-d46c-4136-a2d5-fe63f1d4a782
Added git workarounds to professor's solution to E6.