Update changelog with relaxed semicolon rule.
Merge pull request #104 from jonas054/semicolons

Update changelog with relaxed semicolon rule.
Fix SpaceAroundEqualsInParameterDefault cop for empty literals.

Literals such as "" and [] don't have positions in the s-expressions
we get from Ripper, so we must use tokens instead, where everything
has a position.
Fix `rake coverage` does not generate coverage report files

This problem is caused by Coveralls.
Coveralls uses SimpleCov internally,
and it changes SimpleCov.formatter to Coverall's formatter
by overwriting standard HTML formatter.
So disable Coveralls except in Travis environment.
Anyway Coveralls does nothing outside of Travis currently.
Exclude spec files from coverage target for accurate coverage result
Merge pull request #106 from yujinakayama/fix-coverage

Fix coverage
Fix undefined method `[]' for nil:NilClass from rspec -e.

$options was only set in CLI#run so running only non-CLI spec examples
could fail because $options was nil when the array index operator was
called on it.
Merge pull request #107 from jonas054/fix_options_nil

Fix undefined method `[]' for nil:NilClass from rspec -e.
New cop ClassMethods
Show error message alongside backtrace
New rule: Avoid single-line methods.

SingleLineMethods reports methods implemented on a single line. It has
a configuration option called AllowIfMethodIsEmpty, which is true by
default.
Merge pull request #109 from jonas054/one_line_methods

New rule: Avoid single-line methods.
New cop FavorJoin
New cop BlockComments