Add Arch distribution config
Merge pull request #1 from DanielOaks/dist-add-arch

Add Arch distribution config
Updated git attributes to deal with eol problems
added thread safety for websockets

This was submitted by Morgan McGuire via proxy.

Hereis his comment...
The actual diff against civetweb is pretty small--I added thread safety
for websockets and rewrote and commented a very confusing function that
 was previously buggy.  The thread safety is critical since there is no
other way for the application to synchronize civet's receipt of a websocket
packet with its own desire to send one. All of this was tested pretty
thoroughly in my own apps and I had a pull request to Sergey that he never
got to before the fork.
Fixed missing mg_lock reference
Added C++ abstraction and example code