Merge branch 'hotfix/centos-url'
Revert "Add documentation for --with-packages."

This reverts commit bdc461aea21d1f4ad73194cd751c5e8beaa4bd5d.
Merge branch 'release/0.3'

Conflicts:
	index.html
Optimize PNG using optipng.
Use minified jQuery.
Merge branch 'hotfix/optimization' into develop