Add option to Docker provisioner to build local images
Remove defunct @build_options reference
add listen as a dep
synced_folders/rsync: rsync-auto command
synced_folders/rsync: unit tests for the callback, fix bug
website/docs: rsync-auto
website/docs: better docs
More specific Solaris <11 detection.

Note: This will probably break on Solaris 12+, but not certain of a better approach for now.
More specific Solaris 11 detection
Merge pull request #2820 from mitchellh/f-rsync-listen

`rsync-auto` command
Merge branch 'add_building_local_dockerfiles' of https://github.com/jpfuentes2/vagrant into jpfuentes2-add_building_local_dockerfiles
provisioners/docker: unit tests for config

/cc @fgrehm - I'm starting to unit test more and more of the plugins.
Just showing you an example because it is quite easy. :)
provisioners/docker: build images using new DSL
Update CHANGELOG
Update CHANGELOG
website/docs: update docs for new rsync commands
Fix typo
Merge pull request #2830 from gustavobgama/fix/master/nfs_typo

Fix typo
core: don't use Tempdir for tests, use Dir.mktmpdir

Tempdir didn't work on Windows, just spun forever.
test: allow skipping certain tests on Windows