old code taken from vim-haxe
changes:
- macro is keyword
- ${} interpolation in single quoted strings
- match #if #else #end not only at start of line
move the syntax file to the root, this makes it easier to add this project as a submodule
get rid of errorfmt, since it can conflict with errorfmt set in other plugins
remove old syntax directory
Add 'syntax/' from commit 'f2273519d14ff66aac79087117e91900adb28dd8'

git-subtree-dir: syntax
git-subtree-mainline: d9fd4a891fb898012c13c97c32f73bdbb4ef6848
git-subtree-split: f2273519d14ff66aac79087117e91900adb28dd8
updated some subtree tools
add remote for dummies
add hxml from old vaxe syntax