Lazy loading plugins with begin/end block
Handle default rtp values
Add multiple lines separately to the log
Support plugin pinning

New supported option called 'pinned' for the Plugin command. When set to
1, the plugin is added to rtp but no install/upgrade operation is
performed.

It not only allows vundle to do rtp management of plugins on VCS other
than git, it also allows leaving plugins that had previously been
managed by vundle in the current state, with no further updates.

Fixes #24, #397
Add comments to document the code

Also add some FIXME markers in places where the code needs more
explanation.
Complete function documentation

- Complete the code documentation effort started by @lucc
- Remove some judgemental comments :sparkles:
- Remove comments pertaining to things that should be opened as issues
- Boxed :exclamation:
Remove Plugins command

It's a duplicate of the PluginSearch command.

Fixes #428
Documentation Update.

* Add modelines to all code/doc files excluding README.md.  The modeline used is: `" vim: set expandtab sts=2 ts=2 sw=2 tw=78 norl:`
* Rename links with /vundle to /Vundle.vim, seems to confuse some people with redirect.
* Remove duplicates from Quickstart, add example of `name` flag.
* Add link to Tips page by @Lucc .
* Change help maintain vundle link directly to the new one.
* README.md line number links updated.

Note: Users with bundle/vundle need to rename vundle to Vundle.vim to use test files. Vundle will continue to function otherwise.

Fixes #413.
Fixes #438.
Treat changed remotes as new plugins

If one had this plugin:

Plugin 'foo/bar'

And now switches to another one with the same name:

Plugin 'baz/bar'

Recognise this scenario and replace the old plugin with the new one,
rather than silently assuming they are the same.

Fixes #367 #48 #183 #400
Check name collissions
Turn get_current_sha into a function

So it can be reused.

Fixes #441
Image Update In Readme

* Fixes 435
Link line numbers updated.
Adding Gitter Badge.

Fixes #443
Adding changelog.
Don't use > in log, highlights.
Changelog link fix.