Make libffi a berkshelf dependency since we're always using 3.x.x now.
Add gdbm as a dependency to ruby on all platforms.
Remove -R flag from LDFLAGS to make Mac OSX compiler happy.
Move ffi libraries correctly on centos.
add node 0.10.26
Force ruby to gdbm in order not to pick up dbm if it exists on the system.
Merge pull request #150 from opscode/jc/nodejs-versions

add node 0.10.26
Merge pull request #147 from opscode/libffi-health-check

chefdk CI fixes
add bundler as dep of berkshelf
Use default_version in openssl
Update preparation for git-cache use
Remove always_build from berkshelf, test-kitchen

The newly added git cache should handle these properly. When the
upstream master branch changes, the cache will be invalidated.
Upgrade chef-gem 11.6.0 => 11.10.4
`curl` should ignore `gnutls` and `librtmp`
Skip building Perl extensions that tend to link to system libs
Update to curl 7.36.0

This version fixes a number of important security vulnerabilities:

* libcurl wrong re-use of connections - http://curl.haxx.se/docs/adv_20140326A.html
* libcurl IP address wildcard certificate validation - http://curl.haxx.se/docs/adv_20140326B.html
* libcurl not verifying certs for TLS to IP address / Darwinssl - http://curl.haxx.se/docs/adv_20140326C.html
* libcurl not verifying certs for TLS to IP address / Winssl - http://curl.haxx.se/docs/adv_20140326D.html
Ensure nokogiri links against embedded zlib.
Use short versions of `mkmf` generated configure flags

`dir_config('foo')` sets up the following configure flags:

  --with-foo-dir
  --with-foo-include
  --with-foo-lib

More info at:

http://ruby-doc.org/stdlib-1.9.3/libdoc/mkmf/rdoc/Object.html#method-i-dir_config
Bump nokogiri's default_version to 1.6.1
Merge pull request #154 from opscode/schisamo/health-check-fixes

Health Check Fixes