+ download in chunks
+refactored offline_to_online
+using deferred objects
+incremental download
+ changes in ui for inc_download, upload, full_download
+ inc_download after upload
+background inc download
+ commented console logs, small changes
+ refactored form controller a bit
+Online, Offline layers to interact with the respective dbs
+ client side unique together validation
+ Appcache enabled
+ Removed delete from ui ( kept the js code)
+bug fix in inc download
+bug fix in background inc download
+ small changes in inc download
+ latest main.js