add vmath as a submod

Author: zjrosen1

.gitmodules

@@ -94,3 +94,6 @@
 [submodule "bundle/vim-webapi"]
 path = bundle/vim-webapi
 url = https://github.com/mattn/webapi-vim.git
+[submodule "bundle/vim-vmath"]
+path = bundle/vim-vmath
+url = git://github.com/nixon/vim-vmath.git

bundle/vim-vmath

@@ -369,6 +369,9 @@ endfunction
 vnoremap * :<C-u>call <SID>VSetSearch()<CR>//<CR><c-o>
 
 " Plugins {{{1
+" vmath {{{2
+vmap <expr> ++ VMATH_YankAndAnalyse()
+nmap ++ vip++
 " Easy-motion {{{2
 " let g:EasyMotion_leader_key = '<Leader>'
 " Emmet {{{2