add mailcore2 as a cocoapod

Podfile

Podfile.lock

Pods/Headers/Private/mailcore2-ios/MailCore/MCAbstract.h

...eaders/Private/mailcore2-ios/MailCore/MCAbstractMessage.h

...rs/Private/mailcore2-ios/MailCore/MCAbstractMessagePart.h

...ders/Private/mailcore2-ios/MailCore/MCAbstractMultipart.h

Pods/Headers/Private/mailcore2-ios/MailCore/MCAbstractPart.h

...aders/Private/mailcore2-ios/MailCore/MCAccountValidator.h

Pods/Headers/Private/mailcore2-ios/MailCore/MCAddress.h

...Headers/Private/mailcore2-ios/MailCore/MCAddressDisplay.h

Pods/Headers/Private/mailcore2-ios/MailCore/MCArray.h

Pods/Headers/Private/mailcore2-ios/MailCore/MCAssert.h

Pods/Headers/Private/mailcore2-ios/MailCore/MCAsync.h

Pods/Headers/Private/mailcore2-ios/MailCore/MCAsyncIMAP.h

Pods/Headers/Private/mailcore2-ios/MailCore/MCAsyncNNTP.h

Pods/Headers/Private/mailcore2-ios/MailCore/MCAsyncPOP.h

Pods/Headers/Private/mailcore2-ios/MailCore/MCAsyncSMTP.h

Pods/Headers/Private/mailcore2-ios/MailCore/MCAttachment.h

...eaders/Private/mailcore2-ios/MailCore/MCAutoreleasePool.h

Pods/Headers/Private/mailcore2-ios/MailCore/MCBaseTypes.h