added skeleton for date and season packages
added guava through maven, updated dates to add nextDay() method, added events
added interfaces for the calendar package, added proper builders to events
deleted useless class
Added some dependencies
Style and formatting fixes
Added intellij idea project files
Added idea to gitignore
Moved classes into main/java
Cleaned up .gitignore
Added Google Java code style definitions
Added some more dependencies to the POM
Rearranged pom.xml
Removed eclipse project files