Separated stable into dropped pets, quest pets, and rare pets, and made countPets only count the former. Made countMounts only count dropped and quest-hatched mounts, not rare mounts.
Added unit tests for proper mount counting and beastmaster achievement, and extended unit tests for proper pet counting.
dropEggs and questEggs now automatically make the full content.eggs list; no manual duplication required.
Simplified run instructions for mocha test.
Merge pull request #138 from lorian/beastmaster-count

Fixes beastmaster to not count gryphons