fixed build problem with threads on SmartOS
Typo fix in docs
Allow easier system libclang use
Fix duplicate entries in filename completion

We could just remove the "dup: 1" part in the completion dict, but that would
leave the duplicate removal up to Vim which would be slow. Also, we might not
end up returning the correct number of results then.
Code style fixes
Update README.md

Small tweaks to the README to make extended installation steps more obvious. It's not perfect yet, but it's a start.
Better check for min supported Vim version
Merge pull request #442 from Trevoke/patch-1

Update README.md
Merge pull request #432 from socketwiz/master

build error on SmartOS
Docs now mention the new ycm-users mailing list
Minor doc rewording
Merge pull request #436 from junkblocker/patch-1

Allow easier system libclang use
Merge https://github.com/Valloric/YouCompleteMe

Conflicts:
	install.sh
Merge branch 'master' of https://github.com/Chiel92/YouCompleteMe

Conflicts:
	README.md