For #51: Replace Joda lib with date4j
Fix crash
small fixes
For #51: fix crash for setCalendarDate and better handling of start day of week
mavenization, restructuring project into 'library' and 'demo' folders

If you want to build with maven you need to:
- locally install newest support library using
android-maven-sdk-deployer
- locally install date4j library jar
(or deploy them into some public repo like Maven Central)
deleting DS_Store
Merge pull request #52 from destil/replace-joda

Mavenization, restructuring project into 'library' and 'demo' folders, fix for #50
Update project structure for maven
Merge pull request #55 from roomorama/replace-joda

Replace joda lib with date4j and support Maven
Add upgrade note
Remove redundant lib
Inform client when Caldroid view has been created
Update docs
Update example
Update docs
Cleaner code to customize date cell
Rename FIT_ALL_MONTHS to SIX_WEEKS_IN_CALENDAR and display extra weeks if this value is true
Optimization for click listener
Prevent crash when call refreshView and Caldroid is not yet created
Add date4j license