added google analytics push events on entering each step

Signed-off-by: filipe garcia <filipe.c.garcia@gmail.com>
added show bug in safari example

also removed use strict to dynamically load html2canvas in safari

Signed-off-by: filipe garcia <filipe.c.garcia@gmail.com>
attempt to sold IE bug in box plugin

Signed-off-by: filipe garcia <filipe.c.garcia@gmail.com>
Merge branch 'refs/heads/master' into gh-pages

Signed-off-by: filipe garcia <filipe.c.garcia@gmail.com>

Conflicts:
	assets/js/html2canvas.js
	assets/js/report-back.js
solved conflict of master and gh pages

Signed-off-by: filipe garcia <filipe.c.garcia@gmail.com>
Merge branch 'refs/heads/master' into gh-pages

Signed-off-by: filipe garcia <filipe.c.garcia@gmail.com>

Conflicts:
	assets/js/report-back.js
added html2canvas to jshint

Signed-off-by: filipe garcia <filipe.c.garcia@gmail.com>
html2canvas added in jshint check

Signed-off-by: filipe garcia <filipe.c.garcia@gmail.com>