[Fix #1219] Avoid reporting }/end sharing line with something

For block ends that follow something else on the same line,
there's no correct or incorrect alignment.
Add support for string source in EndOfLine cop

`ProcessedSource` supports string sources, but `EndOfLine` cop would fail. This
ensures that `EndOfLine` cop supports strings.

* expose original source of `ProcessedSource`
* simplify `EndOfLine` cop logic
Merge pull request #1203 from gylaz/end-of-line-string-support

Add support for string source in EndOfLine cop
Merge pull request #1221 from jonas054/1219_block_end_align

[Fix #1219] Avoid reporting }/end sharing line with something
[Fix #1223] Correct the offense range in MultilineBlockLayout
[Fix #1224] Really fix MultilineBlockLayout's range
Improve variable name
Improve offense message
Allow Rubinius build failures

Something seems to be wrong with Rubinius over at TravisCI, so
let's allow failures there for the time being.
Fix broken spec
Mention RunRailsCops directive in README
Merge pull request #1226 from yujinakayama/mention-runrailscop-in-readme

Mention RunRailsCops configuration directive in README
[#1220] Create namespace Metrics and move some cops there

Move the Style cops BlockNesting, ClassLength,
CyclomaticComplexity, MetricsLineLength, MethodLength,
and ParameterLists to the new namespace.
[Fix #1220] New cop PerceivedComplexity

Configurable Max and with special support for --auto-gen-config.

Counts else nodes but does not count when nodes.
[Refactor] Extract MethodComplexity mixin module
Give warning when a cop name has the wrong namespace

This is more or less necessary when we move cops from one
namespace to another. If there are no ambiguities, we
automatically change to the right namespace at run-time,
not changing any files.
[Refactor] Make Cop class smaller
Merge pull request #1231 from jonas054/1220_new_complexity

New cop Metrics/PerceivedComplexity
Update README with info on Metrics cops

Forgotten in earlier PR.
Merge pull request #1234 from jonas054/update_readme_metrics

Update README with info on Metrics cops