Capitalize Vundle and add in-vim install method

Author: cincodenada

README.md

@@ -101,7 +101,7 @@ called "python".
 
 Clone this repository in your `~/.vim/bundle` directory
 
-### Using vundle
+### Using Vundle
 
 Add this to your `~/.vimrc` file:
 
@@ -115,6 +115,16 @@ Then, from the command line, run:
 vim +PluginInstall +qall
 ```
 
+Or, in vim, run:
+```vim
+:PluginInstall
+```
+
+For new changes to take effect, you may have to reload your .vimrc first:
+```vim
+:source $MYVIMRC
+```
+
 ## Quick guide
 
 Set up any DBGP protocol debugger, e.g. Xdebug. (See :help VdebugSetUp). Start Vdebug with `<F5>`, which will make it wait for an incoming connection. Run the script you want to debug, with the debugging engine enabled. A new tab will open with the debugging interface.