Recognize some Ruby files related with Chef: Berksfile, Cheffile, Vaganbondfile

* Berksfile: http://berkshelf.com/#the-berksfile
* Cheffile: https://github.com/applicationsonline/librarian-chef#the-cheffile
* Vaganbondfile: https://github.com/chrisroberts/vagabond#how-does-it-work
AllCops:Include are excluded from Style/FileName by default, remove them from default.yml.

Related with commit c2b3fb5e.
New cop Metrics/AbcSize

Measures the Assignment Branch Condition metric defined by
http://c2.com/cgi/wiki?AbcMetric
Merge pull request #1370 from jonas054/abc_metric_cop

New cop Metrics/AbcSize
Merge pull request #1366 from onddo/recognize-some-chef-files

Recognize some Ruby files related with Chef: Berksfile, Cheffile, ...
Regex is slow, start_with? is fast

The `[qQ]?` part of the regex was superfluous, as was the `i` flag.

Some code -- I am not sure which -- has been changed, so that the
`<<-` part of the regex is no longer necessary. There specs that cover
the heredocs are still in place though (and the code works with the
`<<` style heredoc as well, by the way).

What was left was `src =~ /^(%|\?)/` which is out-performed by
`String#start_with?`
Regex is slow, start_with? is fast

When checking the value of the first few characters of a string,
`#start_with?` is always faster than using a regex.
Regex is slow, end_with? is fast
Spec was using Tempfile without requiring it
Spec was requiring tempfile without using it
Merge pull request #1375 from bquorning/missing-require

Spec was using Tempfile without requiring it
Merge pull request #1376 from bquorning/string-methods-faster-than-regex

String methods faster than regex
[Fix #1350] Check that Blocks cop doesn't create syntax errors

The cops AndOr and Not share the same logic, but it looks like
their autocorrect methods are not capable of introducing syntax
errors.
Fix spelling error in spec
Merge pull request #1377 from jonas054/1350_autocorrect_blocks

[Fix #1350] Check that Blocks cop doesn't create syntax errors
[Fix #1374] Always auto-correct one cop at a time

The only way to guarantee that two cops don't destroy
the code by doing simultaneous changes, is to save
the file after letting one cop to its corrections, and
then parse it again before doing any more corrections.
Merge pull request #1379 from jonas054/1374_autocorrect_problem

[Fix #1374] Always auto-correct one cop at a time
[Fix #1352] Add regexp configuration to WordArray

The Style/WordArray cop can now be configured with the WordCharacters
option. Its value must be a Regexp character class (as a string).
Merge pull request #1371 from bquorning/wordarray-recognize-email-addresses

WordArray allows all characters except spaces