refactor skinClass
set version to 1.3.20
refactor skin
fix collection
fix test cases
add grid, admin, and grid_store.js
remove integration js
mv ./lib/mongoskin to ./lib
Modify Readme
fix Make test
fix cursor
100% test coverage
add coveralls
remove node 0.6, add node 0.11
add coveralls badge
update readme and examples
set version to mongoskin 1.3.20-alpha
Merge branch '1.3.20'