site branch icons adjustments
added back Facebook like button
added automatic jekyll parser to makefile
stupid bug fixed
minor adjustments for site branch icons
corrected lists and hyperlinks style from slide2-2

suggested by Lee Weiting
refilled README
* U2bU
added back site/index
Merge branch 'gh-pages' of https://github.com/aaronliu0719/nuclearmb into gh-pages