[Installer] Embed Pods Frameworks in UI Tests

fixes https://github.com/CocoaPods/CocoaPods/issues/5250

Move Pods Project Generation into an Xcode namespace

[PodTarget] Make #recursive_dependent_targets handle cyclic dependencies

[Cache] Use `git ls-remote` to skip full clones for branch dependencies

[Travis] Add Ruby 2.3 to matrix

Fixes #5362

Fix minimum deployment target error for local pods.

When resolver fails because of platform deployment target for a local pod,
`possibility` value is non-nil. We use this to discriminate this error type with
conflict caused by a change in dependencies of the local pod.

Use `require` instead of `autoload` for fourflusher

Fixes #5445

This adds the posibility of caches hits for git branch depedencies.
Previously, since pods didn't know the commit the branch points it
always did a full clone of the repo. Using `ls-remote` we can check the
commit the branch points to and reuse cached version of the pods if
available.

[Validator] Support linting pods that link against XCTest

* Fix Dangerfile Rubocop violations

* Update CHANGELOG.md

* Update docs

* Don't use Type = Type::Type in tests

use `pr_title` instead of `pr.title` in Dangerfile

[Setup] Allow running with --silent

Added rake task to check submodules

[PodTarget] Allow non-deduped targets to be frameworks

Fix typo in ISSUE_TEMPLATE.md

[XCConfigHelper] Add the ability to inhibit swift warnings

Release 1.0.1

# gpg: Signature made Thu Jun  2 09:48:54 2016 CEST using RSA key ID 3DFEE92F
# gpg: Good signature from "Marius Rackwitz <kontakt@mariusrackwitz.de>" [unknown]
# gpg:                 aka "Marius Rackwitz <git@mariusrackwitz.de>" [unknown]
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: A17F 9CBC 413C 82A4 6079  0B66 0871 0E60 6F3D F673
#      Subkey fingerprint: 3770 0395 CD71 7665 8293  986E 5CCF E6D8 3DFE E92F

# Conflicts:
#	Gemfile
#	Gemfile.lock

Attention: This change should stay specific to release branches!

[Gemfile] Add flag to skip unreleased versions