IMipHandler did not strip mailto: frome email addresses.

Also, the unittest was wrong ;)

Fixes #561
Added a 'plugins' page to the browser plugin.
Use the new build env on Travis

faster vms, more ram, more cpu, better boot times, free 2-4-1 coffee at your favourite cafe

docs coming soon
Added plugin information to a few more plugins.

Fixed a unittest problem.
Merge pull request #562 from joshk/patch-1

Use the new build env on Travis
Speed composer up a little.
Merge branch 'master' of github.com:fruux/sabre-dav
Merge branch '2.1'

Conflicts:
	ChangeLog.md
	lib/DAV/Version.php
Replace `scandir` by `FilesystemIterator`.

1. `scandir` is slow compared to `FilesystemIterator`,
2. `FilesystemIterator::SKIP_DOTS` is cross-FS,
3. using an iterator is better than looping on a huge array (in the case
   where there is a lot of entries in the directory), it saves memory.
Merge pull request #565 from Hywan/remove_scandir

Replace `scandir` by `FilesystemIterator`
Adding sync-token back to the ics generator.
Several issues fixed in the migration process.

Fixes #566
Prepping for a release.
Fixed the second issue from #566.
Switched to new api for creating request objects.
 Freebusy was throwing an error when targetting accounts that have no calendars. Fixes #567
Merge branch '2.1'

Conflicts:
	ChangeLog.md
	lib/DAV/Version.php
Merge branch 'master' of https://github.com/fruux/sabre-dav