added page templates

Test build should display the page text within the placeholder menu items. 

Help page - addresses issue: https://github.com/opentechinstitute/luci-commotion/issues/105 
About page - addresses issue: https://github.com/opentechinstitute/luci-commotion/issues/106
License page - addresses issue: https://github.com/opentechinstitute/luci-commotion/issues/107