keybinding updates

* `<leader><leader` to open `:Files`
* `<leader>q`       to quit
* `<leader><space>` to clear highlights

.vim/vim-keys-help.md

@@ -19,7 +19,7 @@ A cheat sheet for my vim customizations
 
 ## Highlights
 
-* `<leader><leader>`        - turn off search highlight
+* `<leader><space>`         - turn off search highlight
 * `<Leader>C`               - toggle row/column cursor
 
 ## Buffers
@@ -41,6 +41,7 @@ A cheat sheet for my vim customizations
 ## FZF
 
 * `<leader>f`               - open FZF files
+* `<leader><leader>`        - open FZF files
 * `<leader>b`               - open FZF buffers 
 
 ## Editing