Add Makefile rule for generating Exuberant Ctags tags file
Scan C++ headers (.h) aswell when generating tags
Fix layout and ECTAGS_FILES
Merge pull request #3357 from nordlow/ctags

Add Makefile rule for generating Exuberant Ctags tags file
Updated project to be buildable with Xcode.
Added a comment about OS=MACOS origin.
Merge pull request #3393 from yglukhov/master

Updated project to be buildable with Xcode on MacOS.