Fixed phpdoc and coding standards
Fixed mistakes when fixing coding standards
Fixed a remaining mistake
Renamed some private methods to a better semantic

The Doubler is creating an instance, not a class.
Improved some phpdoc
Moved the license header at the top of the files
Updated changelog and version for 1.1
Removed unused import block
Scrutinizer Auto-Fixes

This patch was automatically generated as part of the following inspection:
https://scrutinizer-ci.com/g/phpspec/prophecy/inspections/4deac7fb-8f14-4b3c-bc11-74ecd7512184

Enabled analysis tools:
 - PHP Analyzer
 - PHP Copy/Paste Detector
 - PHP PDepend
Merge pull request #82 from stof/scrutinizer-patch-1

Scrutinizer Auto-Fixes
Changed the way to check for Closure::bind to support HHVM
Added a class patch to allow doubling exceptions on HHVM