Update and rename FPPPicker.spec to FPPicker.spec

Fixed copy past error FPPPicker to FPPicker
Merge branch 'master' of https://github.com/Filepicker/ios
Update FPPicker.spec

fixed pod spec
Rename FPPicker.spec to FilepickerSDK.spec

working spec
Merge pull request #18 from apps4u/master

Fix Podspec