added link to the emacs c/c++ ide documentation
added ggtags
adding company-c-headers and path to c++ files, so now we can complete headers
haskell-indentation seem to be more advanced than haskell-indent.
added pretty-greek function back.
haskell: added hasktags
start ghc-mod on haskell-mode
added links to the emacs haskell configuration files and tutorial.
see more keys on ghc-mod website.
changed configuration of the company-mode