Update neobundle functions

I was getting this error:
```
[neobundle] neobundle#rc() is deprecated function.
[neobundle] It will be removed in the next version.
[neobundle] Please use neobundle#begin()/neobundle#end() instead.
```
With those changes, it fixed the vim configuration and the error went away.
Merge pull request #7 from rgoomar/patch-2

Update neobundle functions