Remove snippet package, fixes #18

- commit yarn lock file to ensure everybody use the same dependency
  versions.  This is considered a best practice.
- move `syntax/` directory to the toplevel since the snippet package is
  now gone.
- gitignore vsix files so that running `vsce package` (build local
  extension) doesn't produce diffs.

Author: olafurpg

.gitignore

@@ -1,4 +1,6 @@
 # Autogenerated synax files
-syntax/syntaxes/Scala.tmLanguage.json
+syntaxes/Scala.tmLanguage.json
 
-syntax/node_modules
+node_modules
+
+*.vsix

syntax/.vscodeignore .vscodeignore

@@ -1,8 +1,34 @@
-# Scala Syntax and Snippets
-Visual Studio Code extensions that provide Scala syntax and snippets.
+# Scala Syntax
 
-Refer to the READMEs in the respective directories:
+[VS Code plugin](https://marketplace.visualstudio.com/items?itemName=scala-lang.scala)
 
-- [Scala Syntax](/syntax)
-- [Scala Snippets](/snippets)
+## Features
 
+Extension providing Scala syntax.
+
+## Requirements
+
+No requirements.
+
+## Development
+
+The source language file is located at `src/typescript/Scala.tmlanguage.ts`. The output tmLanguage file `syntaxes/Scala.tmLanguage.json` is marked as ignored in git and shouldn't be commited.
+
+To generate the ouput file either use build command or run:
+
+```bash
+npm install
+```
+
+The output file is validated against the json schema before being written.
+
+
+## Based on
+* Plugin: https://github.com/daltonjorge/vscode-scala
+* Template: https://github.com/sellmerfud/scala.tmbundle (https://github.com/mads-hartmann/scala.tmbundle)
+* Textmate json schema: https://github.com/Septh/tmlanguage/blob/master/tmLanguage.schema.json
+
+## License
+[MIT](LICENSE)
+
+-----------------------------------------------------------------------------------------------------------