Use new syntax highlighting engine from zyedidia/highlight

This changes all the syntax files in the runtime directory and also
changes how syntax highlighting is done from inside micro.

runtime/syntax/README.md

@@ -1,41 +1,5 @@
-# Micro syntax highlighting files
+# Syntax Files
 
-These are the syntax highlighting files for micro. To install them, just
-put all the syntax files in `~/.config/micro/syntax`.
-
-They are taken from Nano, specifically from [this repository](https://github.com/scopatz/nanorc).
-Micro syntax files are almost identical to Nano's, except for some key differences:
-
-* Micro does not use `icolor`. Instead, for a case insensitive match, use the case insensitive flag (`i`) in the regular expression
-    * For example, `icolor green ".*"` would become `color green (i) ".*"`
-
-# Using with colorschemes
-
-Not all of these files have been converted to use micro's colorscheme feature. Most of them just hardcode the colors, which
-can be problematic depending on the colorscheme you use.
-
-Here is a list of the files that have been converted to properly use colorschemes:
-
-* vi
-* go
-* c
-* d
-* markdown
-* html
-* lua
-* swift
-* rust
-* java
-* javascript
-* pascal
-* python
-* ruby
-* sh
-* git
-* tex
-* solidity
-
-# License
-
-Because the nano syntax files I have modified are distributed under the GNU GPLv3 license, these files are also distributed
-under that license. See [LICENSE](LICENSE).
+Here are highlight's syntax files. If you would like to make a new syntax file, you should first check it
+with the `syntax_checker.go` program. Just place it in this directory and run the program (`go run syntax_checker.go`)
+and it will let you know if there are issues with any of the files in the directory.