added extension abbreviations
added link colors
expanding only those in the current slide (not necessary, but in case)
introduced a keystrokeManager
added the styles for the minibuffer
renamed reset -> init
defined many handlers
removed `wrapper'
migrated to keystrokeHandler
added identity
bugfix: prompt -> _prompt
added default continuation to each handlers
migrated to minibuffer
`s' key migrated to minibuffer
removed sectionPrompt; added #prompt:after
Merge branch 'gh-pages'

Conflicts:
	presen.org.html
added 'unfold' '+' '-' command