Remove deprecated methods on ProxyManager\Configuration

just linking #186
Bumping master branch alias and removing PHP 5.3 support
Merge pull request #130 from Ocramius/bump/master-branch-dev-version

[WIP] Master branch dev version / 2.0.x dependencies
Merge pull request #200 from malukenho/feature/remove-deprecated-methods-from-configuration

Remove deprecated methods on ProxyManager\Configuration
s/'Closure'/Closure::class
Requiring PHP `~5.5`
Skipping build for PHP 5.4
Removing check for `Closure::bind()` support
#167 - Removing check for `Closure::bind()` support
#167 - s/'Closure'/Closure::class
#167 - don't skip tests depending on `Closure::bind()` support (assuming it as of PHP 5.4)
#167 - s/'Phar'/Phar::class
#167 - s/'Kitchen'/Kitchen::class
#167 - `::class` over string reference
#167 - `::class` over string reference in factory tests
#167 - `::class` over string reference in factory tests
#167 - `::class` over string reference in generator tests
#167 - don't skip tests depending on `Closure::bind()` support (assuming it as of PHP 5.4)
#167 - don't skip tests depending on `ReflectionParameter::isCallable()` support (assuming it as of PHP 5.4)
#167 - `::class` over string reference in method generator tests