prepare cookbooks for chef

$ mkdir chef-recipes/cookbooks && touch chef-recipes/cookbooks/.gitkeep
add cookbook(build-essential) for chef

$ curl -OL https://codeload.github.com/opscode-cookbooks/build-essential/zip/master \
&& unzip master \
&& mv build-essential-master chef-recipes/cookbooks/build-essential \
&& rm master
Merge branch '#20'

fix #20