Added MockDatabase and initial EventEntityManager tests with Zack
Began creating Category, CategoryEntityManager, and CategoryModel
classes. Only the Category class is finished.
Merge branch 'i2_bugfixes' of https://github.com/cs3733-team4/wpi-suite into event_categories
Adding muon nutrinos & various other leptons. 
+Nilesh Patel for code & algorithm
+Ted Meyer for algorithm
Added some tests
Merge branch 'event_categories' of github.com:cs3733-team4/wpi-suite
into event_categories
Added owners to categories
Added all necessary methods that needs to be implemented for the CategoryEntityManager
Added the notImplementedExceptions
phase changing latest tau nutrinos
Removed last Categories/Events problems
Added save and count methods to EventEntityManager
Started getEntity method
Merge branch 'event_categories' of ssh://github.com/cs3733-team4/wpi-suite into event_categories
Created "update" method in CategoryEntityManager class and created
getCategoryID in Event class
Added getAll()
Created deleteEntity and deleteAll methods in CategoryEntityManager
class
Added getCatergoryByName
Merge branch 'event_categories' of ssh://github.com/cs3733-team4/wpi-suite into event_categories
Added getters for category