hlim10 jcheng26: 
1. Created 5 classes(Warrior, Log, Mage, Archer, Summoner) - will be
changed later.
2. Can choose one of characters
2. Made each character's stat
3. Made Database to store character info(character, stat, level...)
4. Made spots for each character's skill
5. Changed to ScrollView to prevent the parts of screen from not being
able to displayed 
6. Did some refactoring - Extracted duplicate lines to new function

(Since our pair had a trouble to commit, we commit everyting what we did
so far at once)
hlim10 jcheung26 : create new character class
jcheng26 hlim10: Added generic character class, working on junit test
cases
jcheng26 hlim10: Character creation and classes test cases written and
implemented. Character leveling tests written and implemented.
jcheng26 hlim10: wrote test cases for leveling stats
jcheng26 hlim10: implemented character class creation. Wrote test for
warrior and mage skills. Implemented skills as well
jcheng26 hlim10: written test cases for Summoner, archer, and Log. And
implemented their respective skills.
hlim10 jcheng26 : Make new Activity of Character Profile in order to
merge with user story3 easier
hlim10 jcheng26 : Refactoring - merge DefaultStat.java with
Character.java
merging master and US2