Add sendfile:off to avoid cache problems with vagrant

solves issue #463
Stricter checking if a yaml key is defined
yum update is synonymous to apt-get upgrade, which is why it has been so slow
piping yum output to /dev/null
Adds HHVM FastCGI support. Closes #63
Revert "Adds HHVM FastCGI support. Closes #63"

This reverts commit 459a57b273d87f620b54b63a7ecc4c17d95c1137.
Revert "Revert "Adds HHVM FastCGI support. Closes #63""

This reverts commit bb4f4df49a987e1b8e0121897967c994f9b004d7.
hhvmBundle => HhvmBundle
Adding link to irc chat room
Merge pull request #489 from airlst/patch-1

Add sendfile:off to avoid cache problems with vagrant
Implementing hash_key_equals()
Merge branch 'master' of github.com:puphpet/puphpet
Passing PHP package to adminer. Fixes #496
Adds execute-files.sh to AWS/RS/DO. Fixes #495
Passing PHP package to puphpet::apache::modspdy
Making Apache installation depend on checkbox
Making Nginx installation depend on checkbox
Added helpblock and tightened up assigning if blocks
Spacing
Making MySQL installation depend on checkbox