Added man page plugin command warning

As of now, the man page does not update when plugins are installed.
Updated man page date

I forgot to change it. I even left myself a reminder!
Revert "Add CNAME option"
Merge pull request #696 from progrium/revert-657-CNAME_option

Revert "Add CNAME option"
Make help output more consistent
Fixed key format check
Display help when invoking dokku with no parameter
Merge pull request #701 from jazzzz/fix-key-format

Fixed key format check
Merge pull request #703 from jazzzz/help-with-no-parameter

Display help when invoking dokku with no parameter
Consolidate readme/wiki docs into organized docs folder
Merge pull request #706 from progrium/docs

Consolidate documentation for viewthedocs
Use -qq flag on apt-get to quiet installations of packages
Silence curl stderr progress output
Ensure curl is installed before using command
Fix issue where certain hosts will not have add-apt-repository installed due to missing packages
Simplify the vagrant workflow

- Moved from wget to cloning the repository
- Add acl-add command to Make
- Modify the docs to use the new methodology
Add a passthru make target for running dokku commands within the vagrant vm
various grammar fixes, spell fixes and added missing words
Merge pull request #709 from rinti/documentation-fixes

various grammar fixes, spell fixes and added missing words
Change targets to vagrant-*