Exclude codemirror

An example of a wrong detection due to codemirror is my project.  https://github.com/mgaitan/waliki
Adding test for codemirror
Merge pull request #1743 from github/codemirror

Codemirror should be considered vendored
Rename file to avoid case-insensitive collision
Merge pull request #1745 from github/f-case

Fix failures on case-insensitive filesystem
Update grammars.yml
Bump version to v4.0.2
Merge pull request #1747 from github/cut-release-v4.0.2

Cut release v4.0.2
Add support for .xht extension which is used in some XHTML files
Add XHTML example file
add Chart.js as vendor

http://www.chartjs.org
sync cached gems
add .cjsx extension for Facebook’s JSX in coffescript
add example cjsx file
change component name
move cjsx before iced
move cjsx before iced
Use a SQF grammar for SQF files

This produces better highlighting than using the C++ grammar.

The grammar is licensed under the Apache 2.0 license.
put cjsx at the top
reorder again…