Renamed files so have underscores instead of dashes and moved methods to autoload files

autoload/indent_guides.vim

@@ -0,0 +1,46 @@
+function! indent_guides#toggle()
+  let g:indent_guides_matches =
+  \ exists('g:indent_guides_matches') ? g:indent_guides_matches : []
+
+  if empty(g:indent_guides_matches)
+    call indent_guides#enable()
+  else
+    call indent_guides#disable()
+  endif
+endfunction
+
+function! indent_guides#enable()
+  call indent_guides#disable()
+  call indent_guides#highlight_colors()
+
+  for level in range(1, g:indent_guides_indent_levels)
+    let group      = 'IndentLevel' . ((level % 2 == 0) ? 'Even' : 'Odd')
+    let multiplier = (&l:expandtab == 1) ? &l:shiftwidth : 1
+    let pattern    = '^\s\{' . (level * multiplier - multiplier) . '\}\zs'
+    let pattern   .= '\s\{' . multiplier . '\}'
+    let pattern   .= '\ze'
+
+    call add(g:indent_guides_matches, matchadd(group, pattern))
+
+    if g:indent_guides_debug
+      echo "matchadd ('" . group . "', '" . pattern . "')"
+    end
+  endfor
+endfunction
+
+function! indent_guides#disable()
+  if !empty(g:indent_guides_matches)
+    let index = 0
+    for item in g:indent_guides_matches
+      call matchdelete(item)
+      call remove(g:indent_guides_matches, index)
+      let index += index
+    endfor
+  endif
+endfunction
+
+function! indent_guides#highlight_colors()
+  hi IndentLevelOdd  guibg=#FFFFFF
+  hi IndentLevelEven guibg=#FBFBFB
+endfunction
+