Add intellij-idea cask @ 2016.1 (#3564)

* Add intellij-idea cask @ 2016.1

Fallback version for license holders

*If there’s a checkbox you can’t complete for any reason, that's okay, just explain in detail why you weren’t able to do so.*

After making all changes to the cask:

- [x] `brew cask audit --download {{cask_file}}` is error-free.
- [x] `brew cask style --fix {{cask_file}}` reports no offenses.
- [x] The commit message includes the cask’s name and version.

Additionally, **if adding a new cask**:

- [x] Named the cask according to the [token reference].
- [x] `brew cask install {{cask_file}}` worked successfully.
- [x] `brew cask uninstall {{cask_file}}` worked successfully.
- [x] Checked there are no [open pull requests] for the same cask.
- [x] Checked the cask was not already refused in [closed issues].
- [x] Checked the cask is submitted to [the correct repo].

[token reference]: https://github.com/caskroom/homebrew-cask/blob/master/doc/cask_language_reference/token_reference.md
[open pull requests]: https://github.com/caskroom/homebrew-versions/pulls
[closed issues]: https://github.com/caskroom/homebrew-versions/issues?q=is%3Aissue+is%3Aclosed
[the correct repo]: https://github.com/caskroom/homebrew-cask/blob/master/doc/development/adding_a_cask.md#finding-a-home-for-your-cask

* Update intellij-idea20161.rb

* Update intellij-idea20161.rb

* Rename intellij-idea20161.rb to intellij-idea2016.rb

Casks/intellij-idea2016.rb

@@ -0,0 +1,21 @@
+cask 'intellij-idea2016' do
+  version '2016.1.4,145.2070'
+  sha256 'c6ed2455cfeeb542c646e6a3d639d32e85ebe8ead87a0f3744dfa3c0a920e2f9'
+
+  url "https://download.jetbrains.com/idea/ideaIU-#{version.before_comma}.dmg"
+  name 'IntelliJ IDEA Ultimate'
+  homepage 'https://www.jetbrains.com/idea/'
+
+  auto_updates true
+
+  app 'IntelliJ IDEA.app'
+
+  zap delete: [
+                "~/Library/Caches/IntelliJIdea#{version.major_minor}",
+                "~/Library/Logs/IntelliJIdea#{version.major_minor}",
+                "~/Library/Application Support/IntelliJIdea#{version.major_minor}",
+                "~/Library/Preferences/IntelliJIdea#{version.major_minor}",
+                '~/Library/Preferences/com.jetbrains.intellij.plist',
+                '~/Library/Saved Application State/com.jetbrains.intellij.savedState',
+              ]
+end