Revert "precompiled assets"

This reverts commit e40e9cbccd980bdf27ef465e4ae17b6f0e943f68.
fixed walk_show size
fixed makeMarkerArray code and revised step instructions
minor refactoring
added buttons.js and buttons to show page
cleaned up some files
before revise coffeescript vars
moved vars to top
with buttons correctly changing view (but with duplicates)
fixed js duplication
added setFirstView