One centos install script
Condense CentOS install instructions
Utopic install instructions
Generic fedora package script
Fix tarball doc/install scripts
Universal installation instructions
Add universal instructions to the tarball
Use version instead of "help" for universal linux
Update install instructions
Allow Client#loop to take an optional timeout

This allows us to non-blockingly poll for available changes, and to avoid
blocking (eg) a reactor if we've been mistakenly woken up.
Merge branch 'loop-timeout' of https://github.com/mpalmer/HyperDex

* 'loop-timeout' of https://github.com/mpalmer/HyperDex:
  Allow Client#loop to take an optional timeout
Cleanup merge style