Make git clone also grab submodules

With just `git clone`, submodules are not grabbed. This is an issue for
certain plugins, such as 'kevinw/pyflakes-vim' that requires a pyflakes
submodule
Also update submodules during git pull
change &rtp manipulation

- make it append only (instead both append + prepend)
- which draws *_rm_a and *_add_a useless as &rtp order gets preserved
- benefits: simpler, faster, less code
fix test for glob* function compatibility

- not all versions of vim 7.2 support the extra argument for glob*(),
  only those compiled with patch 51
README update

- link to contributors
README examples moved to Wiki
Merge https://github.com/acx0/vundle
Larger screenshot
Merge https://github.com/mduan/vundle
Revert "change &rtp manipulation"

- causes #203

This reverts commit 1e140c9f6b5c1c2b9c3a6c01723b3d627b56fb31.
add syntax test cases
Added alias 'BundleUpdate' for 'BundleInstall!'.

'BundleUpdate' is a more intuitive and explicit command, whereas 'BundleInstall!' isn't.
escape shell commands for windows

inspired by
https://github.com/gmarik/vundle/pull/228 and
https://github.com/gmarik/vundle/pull/172

Vim patch #445 changed shell escaping and introduced incompatabilities for vundle.
Now vundle only escapes joined commands with double quotes on windows when shellxquote is not set to '('.
This workaround closes https://github.com/gmarik/vundle/issues/146 - the mentioned workaround
is no longer needed, but it does not break a vim configurations which contains "set shellxquote=".

DRY shell escaping and modified (hopefully) all relevant places.
Merge pull request #215 from mt3/master

Closes #206: alias `BundleUpdate` to `BundleInstall!`
Escape the repo URI when cloning
Fix link to vim.org in README

Fixes #217
fix Readme formatting

**V**imb**undle** no longer rendering properly...
Fix wiki links

Seems to have broken with GitHub's relative link change https://github.com/blog/1395-relative-links-in-markup-files
Merge pull request #263 from benjaminoakes/patch-1

Fix wiki links

Github's new way of handling relative links broke some of the
links in the readme file.
Prevent side effect of wildignore

Certain wildignore values prevented the various logs from being
viewable.

Fixes #249