add freetype dependency

This dependency is already installed if users install PHP through homebrew, but for users that did not do this, it will look at the outdated OSX headers causing build failures.

See https://github.com/facebook/hhvm/issues/1580
Merge pull request #17 from danslo/patch-1

add freetype dependency
update to 2.3.3
Merge branch 'master' of https://github.com/mcuadros/homebrew-hhvm

* 'master' of https://github.com/mcuadros/homebrew-hhvm:
  add freetype dependency
2.4.0 upgrade
fix related to https://github.com/facebook/hhvm/issues/1681
fix hardcoded /usr/local/bin in boostfb formula
Fix mysql and libelf include dirs in hhvm formula

This is needed on a non-default HOMEBREW_PREFIX to build.
actually working include paths
Fix freetype2 include directory not being added to CFLAGS

See https://github.com/facebook/hhvm/issues/1380
Install hhvm in the Cellar
Merge pull request #23 from mcuelenaere/fixes

Fix freetype2 include directory + install hhvm in Cellar
Merge remote-tracking branch 'upstream/master' into brew_prefix

Conflicts:
	Formula/hhvm.rb
another HOMEBREW_PREFIX
Merge pull request #21 from oker1/brew_prefix

Fix hardcoded /usr/local/bin in boostfb formula
working again, need review
Correct install order of MySQL deps
Merge pull request #29 from ardecvz/mysql-patch

Correct install order of MySQL deps
Introduce CAVEATS section for tricky install situations
Merge pull request #30 from ardecvz/caveats

Introduce CAVEATS section for tricky install situations