added a readme file.

README.md

@@ -0,0 +1,66 @@
+h1. Installation  
+
+
+h1. Usage  
+
+The following key mappings are provided by default (there is also a menu 
+provided that contains menu items corresponding to all the below mappings): 
+
+Most of the following mappings are for normal/visual mode only. The 
+|NERDComInsertComment| mapping is for insert mode only. 
+
+[count]<leader>cc |NERDComComment| 
+Comment out the current line or text selected in visual mode. 
+
+
+[count]<leader>cn |NERDComNestedComment| 
+Same as <leader>cc but forces nesting. 
+
+
+[count]<leader>c<space> |NERDComToggleComment| 
+Toggles the comment state of the selected line(s). If the topmost selected 
+line is commented, all selected lines are uncommented and vice versa. 
+
+
+[count]<leader>cm |NERDComMinimalComment| 
+Comments the given lines using only one set of multipart delimiters. 
+
+
+[count]<leader>ci |NERDComInvertComment| 
+Toggles the comment state of the selected line(s) individually. 
+
+
+[count]<leader>cs |NERDComSexyComment| 
+Comments out the selected lines ``sexily'' 
+
+
+[count]<leader>cy |NERDComYankComment| 
+Same as <leader>cc except that the commented line(s) are yanked first. 
+
+
+<leader>c$ |NERDComEOLComment| 
+Comments the current line from the cursor to the end of line. 
+
+
+<leader>cA |NERDComAppendComment| 
+Adds comment delimiters to the end of line and goes into insert mode between 
+them. 
+
+
+|NERDComInsertComment| 
+Adds comment delimiters at the current cursor position and inserts between. 
+Disabled by default. 
+
+
+<leader>ca |NERDComAltDelim| 
+Switches to the alternative set of delimiters. 
+
+
+[count]<leader>cl 
+[count]<leader>cb    |NERDComAlignedComment| 
+Same as |NERDComComment| except that the delimiters are aligned down the 
+left side (<leader>cl) or both sides (<leader>cb). 
+
+
+[count]<leader>cu |NERDComUncommentLine| 
+Uncomments the selected line(s).