Merge pull request #305 from AndlyticsProject/dev

Dev-->Master - Release 2.4.0
Merge pull request #307 from AndlyticsProject/dev

updated header image
fixed typo
Merge branch 'dev'
Merge branch 'dev'
added more debug logging for skipped apps
added description and changelog to AppInfo
fixed typo, columns were not added when creating from scratch
get last market update date
added AppDetails to store description, etc.
linked Links to AppDetails with FK
Merge pull request #351 from nelenkov/links-page

Added AppDetails table/class; linked Links to AppDetails with FK
Upstream #352 add appinfo page with description, version, changelog, last store update date, links.
GH #352 redesigned links (to be renamed appinfo) page
GH #352 renamed links to appinfo.
Fix error creating numerous app info rows, preventing changelog/descriptions from being updated.