Layout fix

Added @colinmollenhour pull request for shared fixtures.

Fix lots of minor bugs, vardocs and typos.

Correct reference to phpunit config file path.

Add example command line for running unit tests (was not obvious to me ho

Use file copy instead of symlink for local.xmp.phpunit when deployed with

# Fix auto-fulfillment of product with default values for a store view, if value was actually not specified.

# Fix auto-fulfillment of product with default values for a store view, if value was actually not specified.

! Fix issue with missed evaluateParentName() method in layout assertions

! Improved performance of EAV and scope fixtures loading

! Some changes in configuration constraints
+ Added JSON constraint + assert method in base test case
! Changes in configuration
! Fix issues with mock object creation
! Changes in app/etc/local.phpunit for supporting controller test cases
! Refactored module, almost all the interfaces moved to lib. 
! NOTICE: Constraints are implmented without knowing about Magento system at all, so everyone can use them, just by creating own module that will implement required interface from lib.

+ Added constraints for configuration node asserting, module nodes assertions.

! closes feature #55 "Create mock by class alias"