Added auto-complete-ctags-cpp.el.
Cleaned up the code.
Set case-fold-search to nil where needed.
Implemented ac-source-ctags-cpp-member-functions to complete member functions.
Implemented ac-source-ctags-cpp-scope-members.
Implemented ac-source-ctags-cpp-scope-members.
Fixed some bugs related to #'ac-ctags-cpp-collect-member-functions.
Added #'ac-ctags-cpp-function-action and some fix.
Extracted parsing part from #'ac-ctags-cpp-determine-type-name.
Corrected some comments.
Fixed some testcases.

Not all tests pass though.
Now create cache for each tags file.
Merged branch 'master' into c++.
Fixed to consider new statements when determining the type of variable.