Merge pull request #41 from djuretic/master

Use egg.text instead of egg.name & fix unit tests
remove relative date & upgrade & export moment
build, export moment & lodash as helpers (to be used in $rootScope)
Change "HP" to "Health" and clarify Potion type
Merge pull request #42 from HabitRPG/sabe_tweak

Change "HP" to "Health" and clarify Potion type
build
add countPets helper
fix for countPets, working when originalCount is 0
build
fix readme: use npm test to run tests