Merge pull request #25 from g3-ks/Keval

Fixed facebook session bug so that dont have to add account on new launc...
Update .gitignore
Delete project.properties
code clean up and necessary comments added
Merge pull request #26 from g3-ks/branch_alshahna

code clean up and necessary comments added
Changed button colour for signout buttons in AddAccountActivity. Centered and enlarged checkboxes in MainActivity.