Update Modulefile for 0.5.0-rc1 release

A lot of code went in between 0.4.0 and head. You may use this git
command to see the full changelog. `git log 0.4.0...HEAD --no-merges`

The highlights are a number of feature additions, mostly around
apache modules and a number of bug fixes, mostly around Puppet 2.6
compatibility. Also, a number of changes went into the a2mod type
and provider which seem to be backwards compatible feature updates.

Because of some slight uncertainty there and what appears to be some
missing spec tests around the new class parameters, this particular
release will go out labeled as a release candidate to solicit
feedback and test coverage improvement before being considered stable.
Merge pull request #125 from puppetlabs/0.5.0/rc1

Update Modulefile for 0.5.0-rc1 release (merging my own metadata-only update)
Add parameter to allow access logs to be turned off
Add spec tests for apache::vhost access_log
Add template comment and formatting for apache::vhost
Add access_log parameter to apache::vhost::proxy also

The vhosts should really be condensed into one template with multiple
options and/or subclasses, but until that happens we just have to repeat
code and tests.
Add parameter docs for access_log
Merge pull request #129 from hunner/access-log-flag

Access log flag
Merge remote-tracking branch 'upstream/master'