This is a fork of http://www.vim.org/scripts/script.php?script_id=1916
This script provides syntax highlight for VDM-SL specification language. http://www.vdmtools.jp/en/
This provides highliting for the vdmsl, vdmrt and vdmpp extentions, also some stupid concealing.
let g:vdm_unicode_conceal_enable = 1 enables the stupid fancy unicode faffery