Add readme.

Author: Andr3wHur5t

README.md

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+# MCAT - Download ALL THE MUSIC
+
+This tool interfaces with the Monster Cat connect API and allows you to download their entire collection.
+
+## Usage:
+
+
+Select all the good stuff: `mcat syncCatalog && mcat select --uniq-track --no-long-mix --no-remix > things-to-download.json`
+
+Count tracks released after a date `mcat select --after 10-10-2017 --count`
+
+Download the selected items `mcat download < things-to-download.json`
+
+Import the downloaded tracks to iTunes `things-to-download.json > mcat import | sh`
+
+
+Main Help:
+```
+CLI tool to interface with the MonsterCat Connect API.
+
+This tool is best used for syncing a target group of tracks with your local machiene (i.e. iTunes).
+
+Commands:
+
+  auth            - Create a session with the MonsterCat Connnect service.
+  session         - Check the status of the current session.
+  syncCatalog     - Syncs MonsterCat's entire catalog to the local cache.
+  select          - Selects a set of tracks from the cache using the given options.
+  download        - Downloads the tracks the specified file.
+  importItunes    - Imports the paths into iTunes.
+  logOut          - Destroys the current session.
+  help            - Prints this help text.
+```
+
+Select Help:
+
+```
+Filters songs from the cached MonsterCat Catalog.
+
+Options:
+
+  --count           - Only outputs the count of matched entries.
+  --schema          - Only outputs the first element to help with filter development.
+  --help            - Prints this text.
+  --all             - Select every entry
+  --uniq-track      - Selects only unique tracks.
+  --remix           - Selects only remixes.
+  --no-remix        - Excludes remixes
+  --long-mix        - Selects only long mixes.
+  --no-long-mix     - Excludes long mixes.
+  --colab           - Selects only songs that have two or more artists.
+  --no-colab        - Selects songs with only one artist.
+  --featuring       - Selects only songs which feature an artist.
+  --downloadable    - Selects only downloadable songs.
+  --early-access    - Selects songs only avalible for early access.
+  --after           - Selects songs created after the specified date.
+  --before          - Selects songs created before the specified date.
+```