feat(SublimeText2.EditorPackages): cache packages

EthanBrown.SublimeText2.EditorPackages/tools/PackageCache/Related Files/README.md

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+# Sublime Text 2 - Related Files
+
+![Screenshot](https://raw.github.com/fabiokr/sublime-related-files/master/screenshots/list.png)
+
+This plugin provides a quick list of related files to the currently open file.
+
+My main use case is to list related files under a Ruby on Rails project. For example, for an opened "app/controllers/examples_controller.rb", related files would be "app/helpers/examples_helper.rb", "app/views/examples/**", and "spec/controllers/examples_controller_spec.rb".
+
+This plugin was inspired by the existing [Open Related](https://github.com/vojtajina/sublime-OpenRelated) and [Rails Related Files](https://github.com/luqman/SublimeText2RailsRelatedFiles).
+
+I wanted something between the two of them (a quick list of results that could be setup for any kinds of projects, not only Rails), so I created my own.
+
+# Key Shortcut
+
+The default shortcut is mapped to "ctrl+super+p". To change it to something more suitable for your needs, you can easily change that by copying the following and replacing the "keys" to your desired key combination:
+
+```json
+{ "keys": ["ctrl+super+p"], "command": "related_files"}
+```
+
+# Configuration
+
+The plugins comes configured to lookup Rails related files, but you can add your own setups. Let's see an existing example:
+
+```json
+// Test/specs for ruby files
+".+\/(app|lib)\/(.+).rb":
+  [
+    "spec/$2_spec.rb",
+    "test/$2_test.rb"
+  ]
+```
+
+The configuration has two parts: the key, which is a regular expression to match against the currently open file, and a list of globs to map the related files.
+
+You can use the $1, $2, etc. on the glob strings to be replace by the extracted parts from the regex.