* Add XCompose language and highlighter
* XCompose fix some errors in the Travis build
* Remove xmodmap files for XCompose
Most xmodmap files aren't XCompose, and there's not enough xmodmap files
which are XCompose to be worth adding to heuristics
* Remove some extensions/filenames from XCompose
* Rename and move sample to correct folder and filename
That we have added in languages.yml
* Use generated language id
