fix typo in line no. 205 of README.md

change from `Plugin 'file///path/from/root/to/plugin'` to `Plugin 'file:///path/from/root/to/plugin'`
Merge pull request #427 from mb1986/patch-1

Use correct filesystem url in README
Resolve full doc dir path when running helptags

Prevents error 150 when user has doc/* in wildignore

Fixes #112
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
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.
Check name collissions