Warn for deprecated specs on outdated
Refactored Command::Outdated to make it stub-able
Update Changelog
Helpful exception when reading version information with merge conflict

related to https://github.com/CocoaPods/CocoaPods/issues/1853, https://github.com/CocoaPods/CocoaPods/issues/2065, https://github.com/CocoaPods/CocoaPods/issues/2056 etc.
Conditionally include `sudo` in suggested update command

Closes https://github.com/CocoaPods/CocoaPods/issues/2058
Improved error message when pulling a spec repo raises

Closes https://github.com/CocoaPods/CocoaPods/issues/1914
Merge pull request #2076 from segiddins/show-repo-name-on-failed-pull

Improved error message when pulling a spec repo raises
Merge pull request #2067 from segiddins/helpful-exception-on-repo-version-merge-conflict

Helpful exception when reading version information with merge conflict
Warn for deprecated specs on install
Merge branch 'check-if-sudo-needed-for-gem-install' of https://github.com/segiddins/CocoaPods into segiddins-check-if-sudo-needed-for-gem-install

* 'check-if-sudo-needed-for-gem-install' of https://github.com/segiddins/CocoaPods:
  Conditionally include `sudo` in suggested update command

Conflicts:
	spec/unit/sources_manager_spec.rb
Merge branch 'segiddins-check-if-sudo-needed-for-gem-install'

* segiddins-check-if-sudo-needed-for-gem-install:
  Conditionally include `sudo` in suggested update command
Merge branch 'warn-for-deprecated-specs-on-outdated' of https://github.com/segiddins/CocoaPods into segiddins-warn-for-deprecated-specs-on-outdated

* 'warn-for-deprecated-specs-on-outdated' of https://github.com/segiddins/CocoaPods:
  Update Changelog
  Refactored Command::Outdated to make it stub-able
  Warn for deprecated specs on outdated

Conflicts:
	CHANGELOG.md
Merge branch 'segiddins-warn-for-deprecated-specs-on-outdated'

* segiddins-warn-for-deprecated-specs-on-outdated:
  Update Changelog
  Refactored Command::Outdated to make it stub-able
  Warn for deprecated specs on outdated
[InstallerSpec] Check for deprecation message when spec.deprecated = true
Merge branch 'warn-for-deprecated-specs-on-install' of https://github.com/segiddins/CocoaPods into segiddins-warn-for-deprecated-specs-on-install

* 'warn-for-deprecated-specs-on-install' of https://github.com/segiddins/CocoaPods:
  [InstallerSpec] Check for deprecation message when spec.deprecated = true
  Warn for deprecated specs on install
Merge branch 'segiddins-warn-for-deprecated-specs-on-install'

* segiddins-warn-for-deprecated-specs-on-install:
  [InstallerSpec] Check for deprecation message when spec.deprecated = true
  Warn for deprecated specs on install