1.semantic fixes.
2. throw exception when calling RegistrationViewController's init.
added SVProgressHUD to pod file
revert last commit.
renames spinnerView to HUDView
added "required" and "optional" in registrationviewcontroller protocol declaration.
Merge branch 'master' into natan-notes
code-review changes.
changes from code-review.
changes from code-review.
Merge branch 'natan-notes' of https://github.com/yuval-netanel/inapp-ios into natan-notes
Merge pull request #5 from yuval-netanel/natan-notes

Natan notes