Release a new version

TASKS:

[GIT] Create branch release_X.X.X (freeze the code)
[DEV] Update version number X.X.X
[DIS] Update changelog iOS app
[QA] Design Test plan
[QA] Regression Test plan
[DIS] Update screenshots if needed
[DIS] Release to appstore
[DOC] Update user manual https://github.com/owncloud/ios/blob/master/user_manual/ios_app.rst
[GIT] Merge branch release_X.X.X in master and develop
[GIT] Create tag and sign it "version_X.X.X"

If it is required to update third party or OC iOS Library

If it is required to update OC iOS Library:

[GIT] Create branch library release_Y.Y.Y (freeze the code)
[mail] inform john@owncloud.com and emil@owncloud.com about the new release.
[DIS] Update README.md (version number, third party, supported versions of iOS, Xcode)
[DIS] Update changelog Doc_Changelog.md
[GIT] Merge branch release_Y.Y.Y in master and develop
[GIT] Create tag and sign it "oc-ios-library-Y.Y.Y"

Provide feedback