changed the download and sample links
Merge branch 'master' of https://github.com/apalsapure/appacitive-dev-center
push notifiction sample added
Merge branch 'master' of https://github.com/apalsapure/appacitive-dev-center
Merge branch 'master' of https://github.com/apalsapure/appacitive-dev-center
sample and download link added in header
Merge branch 'master' of https://github.com/apalsapure/appacitive-dev-center
fixed urls on platform pages:
added notification app sample
upgraded movie app sdk
upgraded todo app sdk
migrated employee directory and push notification to new sdk
platform link variable added
fixed the download link on home page
added collection and some more docs for data store guides
added installation content  for javascript
added affix for getting started left navigation and guides link to header
added guides dropdown
added page specific navigation for platform select
added getting started link to all pages