Changed order of Framework_Search_Paths fixes #1558
sets framework_search_paths conditionally based on platform
Updated unit tests
[SourcesManager] Ignore repos with unreachable sources on update
[CHANGELOG] Update
Merge branch 'issue_1558_Framework_Search_Paths' of https://github.com/kwales/CocoaPods into kwales-issue_1558_Framework_Search_Paths

* 'issue_1558_Framework_Search_Paths' of https://github.com/kwales/CocoaPods:
  Updated unit tests
  sets framework_search_paths conditionally based on platform
  Changed order of Framework_Search_Paths fixes #1558

Conflicts:
	CHANGELOG.md
[Validator] Cleanup spec
[Validator] Test that pods are built per platform
Refactor some `pod spec COMMAND` tests and add browse tests
[Command::Spec] Removed specs relative to Command::Spec::Browse
Fix method calls to follow proper conventions
Merge branch 'master'

Conflicts:
	CHANGELOG.md
[Sandbox] Use the realpath of the root.

Fixes pod lib lint
Closes #1566
Merge pull request #1595 from Kapin/unreachable-repo-fix

[SourcesManager] Ignore repos with unreachable sources on update