Code for reading call logs and upload to Parse

Desc :
Final Code for reading call logs from phone and uploading to Parse

Known Issues :
1. Requires SD card for the application to run properly
2. Will run without SD card but will result in duplication of data at
server

Notes :
1. Since had cloned this branch from Master and the uploaded code has no
relation to the code in the Master, that code has been deleted.
The branch now has only the code for call log upload.
2. Also has a sample code for querying Parse, which can be used to
generate data for Google Charting tools.