update to v3.3.7

paper: fix button transition for chrome, closes thomaspark#570

cerulean: fix header line-height, closes thomaspark#541

update bootswatch to 3.3.6

Merge pull request thomaspark#516 from guru-digital/gh-pages

Fix google font import issue with scss

set web font path as variable that can be overridden, closes thomaspa…

…rk#507

set default $bootstrap-sass-asset-helper value

add bower postinstall script to copy font files, closes thomaspark#483

update bootswatch to 3.3.5

bump build version to 3.3.4+1