Version 1.1.0

Added speed options property. Now you may customize animation speed.
Range is from 0 to "interval". Consider to use 20-50 milliseconds less
then interval to avoid animation breaks. Added sample custom stylesheet
mb-comingsoon-iceberg.css (and corrisponding less file).
Version 1.1.0
Merge branch 'master' of https://github.com/magicbruno/mb-comingsoon