add NSString#temporary

get a temporary path.
pass all tests

Tests for date fail in my timezone.
I use utc for compare.
If there is better way, please improve it.

Tests for UIAleartView with input are not stable in my environment.
It's fine after taking a little bit wait.
add NSOrderedSet

Add
NSOrderedSet#to_a
NSArray#nsorderedset
Merge pull request #116 from katsuyoshi/tests

pass all tests
Merge pull request #118 from katsuyoshi/nsorderedset

add NSOrderedSet
Merge pull request #117 from katsuyoshi/temporary

add NSString#temporary
deprecated file-related string methods, added file_url, updated specs
added tests for deprecated methods
use regular {} to avoid memory leak
use custom class to remove textview observers on dealloc, and fix memory leak.
fixes to NSString and specs regarding recent '_path' methods / deprecated methods
fix this spec to work on any day of the month
added support for 'key?' suffix on anonymous methods; returns !!obj[key] (always 'true' or 'false')
Fix to avoid a cyclic reference in UIBarButtonItem.
Merge pull request #119 from otagi/master

Fix to avoid a cyclic reference in UIBarButtonItem.
just a variable name change
added check for 'weak!' method, and bumped version to 1.4.5