docs($cordovaSQLite): add background db api
docs($cordovaGoogleAnalytics): add documentation
Merge pull request #300 from mrzmyr/docs-add-google-analytics

docs($cordovaGoogleAnalytics): add documentation
docs($cordovaPreferences): add documentation
docs($cordovaZip): add documentation
Merge pull request #303 from mrzmyr/docs-zip

docs($cordovaZip): add documentation
Merge pull request #318 from mrzmyr/docs-add-application-preferences

docs($cordovaPreferences): add documentation
Merge pull request #317 from mrzmyr/docs-sqlite-update-api

docs($cordovaSQLite): add background db api