Added two Vim tutorials

I added two additional resources for learning Vim, please review them and if acceptable merge.

Thanks
Merge pull request #585 from wazery/patch-1

Added two Vim tutorials
Typo
Merge pull request #588 from KyleAMathews/patch-1

Typo
update submodules
Merge pull request #589 from chrisdambrosio/update_submodules

Update submodules
Pep 8 standard says "Spaces are the preferred indentation method."
Merge pull request #590 from tasaif/fix_python_pep_8_tab_character_expansion

Pep 8 standard says "Spaces are the preferred indentation method."