Merge pull request #120 from neothemachine/master

Fix for file locking problem on project deletion
doc
Disable component group on new project creation if cabal file already
exists (since existing file will be reused)
add Haskell and Yesod natures to other projects
(https://github.com/JPMoresmau/eclipsefp/issues/102)
force selection to false if disabled
add jump-to-declaration hyperlinks when pressing ctrl