Fixed calculation of covered percentage for groups of files
Fixed strength calculation - was previously percentage
Remove default addition of 'vendor/plugins' group when using 'rails' adapter.
Merge https://github.com/colszowka/simplecov

Conflicts:
	CHANGELOG.md
	test/test_file_list.rb
Remove Ruby warning

`lib/simplecov/jruby16_fix.rb:31: warning: assigned but unused variable - e`

The previous catch-all `rescue` was used to swallow this exception:
`Errno::ENOENT: No such file or directory - test/fixtures/generated_buddha.rb`
We now make sure the file is present with `File.file?`.

Also reverts 6f711098dbe3dccac067f1a128fc33ef2f845079 and moves the fix
into jruby_fix.rb to keep JRuby fixes in the same file.
Remove Ruby warning

`lib/simplecov/defaults:57: warning: instance variable @exit_status not initialized`

We now ensure that @exit_status is always initialized.

Also did some cosmetic arrangements with no functional changes.
add documentation about running tests
remove duplicated code and fix Result#total_lines

* delegate a bunch of methods to the FileList class
* fixes #146
correct a typo
update changelog
Merge https://github.com/colszowka/simplecov

Conflicts:
	CHANGELOG.md
Lock resultset json file

To prevent two processes writes at the same time.
Rescue LoadError and return empty set
Add support for MiniTest.
Updated information about SimpleCov-Vim

SC-V is being folded into a small collection of dev/testing tools called
cadre
Merge pull request #254 from nyarly/master

Updated information about SimpleCov-Vim
Update README.md

Fix broken Pledgie image. dolla dolla bill y'all
Restructuring Changelog for better readability
Better Changelog headings
Working on 0.8.0 release notes