Merge pull request #20 from jastix/num

docs&specs. _n.next, _n.pred, _n.round
split files into core, base and oo
improve callFunctionWithThis
Remove $Array call in numeric
remove option to overwrite existing functions in god_mode.
_a.isArray check if array can be coerced to array
bump Gemfile.lock
simplify R.Base and R.Support. Extract methods into RubyJS object.
add _a.size spec for sparse arrays
add _n.pred _n.next doc specs
bump ruby files
bump again
add chainable wrappers
bump ruby.*
remove unnecessary R.Wrapper reference
mv lib/base to lib/core, lib/lite to lib/base, lib/corelib to lib/oo