Revert "Revert beta 2 in podspec until we're ready to publish." (pint…

…erest#138)

This reverts commit df836fb.

Update to beta 3.0.1

This is a bettor solution. Thank you @johnezang! (pinterest#98)

* This is a bettor solution. Thank you @johnezang!

* Add a sanity test

* Only delete directory if it exists

Update to 2.2.2

Merge pull request pinterest#71 from benasher44/basher_pincache_2.2.1

PINCache 2.2.1 release

Merge pull request pinterest#69 from benasher44/basher_fix_lint

Fixed watchos linting errors

Merge pull request pinterest#42 from mRs-/master

[BUGFIX] Critical! String Encoding Bugfix

Bumping to 2.1.1 to republish podspec with tvOS support

Merge pull request pinterest#25 from pinterest/fixXcode7Warnings

Fix Xcode 7 warnings