"New User" Activity to appear after "New Issue" Activity

This will help users to fill details first before worrying about their
contact information.
Made changes based on feedback

- Added light icons
- Modified check condition logic to use gearSource.isNewUser()
- Refactored code to minimise new methods
- Not sending Bundle to HSActivityManager methods
- Added new icons in res/values/hs_default_theme.xml
Merge pull request #14 from happyfoxinc/new-issue-before-new-user

"New User" Activity to appear after "New Issue" Activity