Updated efficiency & implemented Notification.Builder

- All-round efficiency update
- Implemented the new Notification.Builder class to build the
notification.
Updated Readme.md

- Changed the whole layout and added descriptions
- Added the new Android only properties to the readme.md
Typo correction
Update README.md
Update

- Added a default value for title, ticker & icon
Update

- Removed debug info
- Exception handling added
Indentation issue fixed
Fixed strange indentation
Update

- AlarmRestoreOnReboot fixed
- AlarmOptions fixed
Merge pull request #12 from fean/v3.0

Updated efficiency & implemented Notification.Builder