update doc

Author: skywind3000

README.md

@@ -95,6 +95,14 @@ hi! VertSplit term=reverse ctermfg=239 ctermbg=233 guifg=#64645e guibg=#211F1C
 
 And `VertSplit` style in `gruvbox` will be overrided.
 
+## Command
+
+```VimL
+:CPatchEdit [NAME]
+```
+
+Edit patch file for a colorscheme, if `[NAME]` is omitted, the name of current colorscheme is used.
+
 ## Configuration
 
 #### g:cpatch_path
@@ -114,6 +122,14 @@ This plugin will try to find scripts located in the directory  specified by `g:c
 
 Default value: `"~/.vim/cpatch"`.
 
+Can accept a list or a comma separated string.
+
+#### g:cpatch_edit
+
+Path for `:CPatchEdit`, it may equal to `g:cpatch_path`, but `g:cpatch_path` can accept a list for multiple search pathes and this option can only provide one path.
+
+Default value: `"~/.vim/cpatch"` .
+
 #### g:cpatch_disable_lua
 
 Disable loading lua files in the patch directory.