Drop Ruby 1.9.2 support
Turn all doc to tomdoc format
Add dev dependency: rspec
Add randomization
Change rspec options
Add new dev dependencies
Improve metrics tasks
Ruby 1.9.3 as a minimum version
Remove reference to Ruby 1.9.2
Add a «Contributing» section
Travis CI: change 2.1.0 to 2.1

There was a bug on Travis CI which cannot install binary for Ruby 2.1.0.
Bump version 0.10.0
Merge branch 'release-0.11'

Conflicts:
	.travis.yml
	Changelog.markdown
	Gemfile.lock
	Rakefile
	VERSION
	coco.gemspec
	lib/coco/formatter/console_formatter.rb
	lib/coco/formatter/context.rb
	lib/coco/formatter/formatter.rb
	lib/coco/formatter/template.rb
	lib/coco/lister/source_lister.rb
	lib/coco/lister/uncovered_lister.rb
	lib/coco/writer/html_files_writer.rb
Update docs badge in README

Update the URL of the docs badge to include it from inch-ci.org instead of inch-pages.github.io (the former being the successor of the Inch Pages project).

[ci skip]
Merge branch 'rrrene-patch-2' into development