add lang/isInteger. closes #32
add lang/is and lang/isnt

Harmony have a proposal for the `is` and `isnt` operators and also for
`Object.is()` and `Object.isnt()`.

see: http://wiki.ecmascript.org/doku.php?id=harmony:egal
ops, forgot to update the jasmine-node version on package.json
change function/throttle spec trying to fix travis-ci flakiness. see #41
direct link to #moutjs channel on webchat.freenode.net [ci skip]
improve number/sign behavior when value is NaN. see #36
typecast val on number/sign and handle +0 and -0 properly. see #36
Use jasmine.Clock to mock the JS clock for timing tests
Cleanup `function/throttle` test
Merge pull request #40 from millermedeiros/sign

improve number/sign behavior when value is NaN or +0 or -0
Merge pull request #44 from conradz/clock-mock

Use jasmine.Clock to mock the JS clock for timing tests
shorthand syntax to object/* & collection/* functions.

had to change the `object/every` structure to avoid circular dependencies and
on most collections methods it was just a matter of adding tests to confirm
behavior and avoid regressions in the future.

also *improved* `object/every` to make it consider any *falsy* value as
a "failure" so now behavior matches `array/every` and string shorthand syntax
can be used to check against any *falsy* values and property existence.

see #15
make sure isInteger works fine with large numbers
fix string/replace spec on IE7 and rename 3rd argument to replacements

spec was failing on IE7 because strings chars can't be accessed with `[0]`
notation. Also renamed 3rd argument to `replacements` to make it different from
the function name (jshint stops complaining and easier to understand).
Merge pull request #45 from millermedeiros/str_replace_ie7

fix string/replace spec on IE7 and rename 3rd argument to replacements
Add object/equals
Fix bug in object/equals and add test for bug
Add object/deepEquals
Do not check `.constructor` in object/equals and object/deepEquals
Clarify own property behavior in object/(equals|deepEquals)