Added a podspec file.

Note: the repo needs a tag of "1.0.0" in order for the podspec to work.
Updated the podspec
Merge pull request #8 from gnyrd/master

Podspec addition
Update the version in the podspec now that there is a tag in the repo.
Added a license type and homepage (no validates with pod spec lint)
Merge pull request #9 from gnyrd/master

Podspec now represents the tag in the repo.
added the ability to control the accessibility level for each value. see this for more details on why it is important: https://blog.loom.com/how-we-fixed-the-ios7-forced-logout-bug-thats-been-plaguing-so-many-apps/
enabled PDKeychainBindings to support accessibility per value.
added a missing method...
Merge pull request #10 from yosit/master

added the ability to control the accessibility level for each value.
Added some additional logging in case of iOS errors
Updated README to reflect recent codesign change
For OSX added possibility of using external keychain file.
Merge pull request #15 from shc-vj/master

For OSX added possibility of using external keychain file.