Minor fix in phpdoc in Colors. In Image added ability to copy region of image (alternative to clone->crop), added methods expand and copyRegion (same as crop without some not needed parameters)
Revert "Minor fix in phpdoc in Colors. In Image added ability to copy region of image (alternative to clone->crop), added methods expand and copyRegion (same as crop without some not needed parameters)"

This reverts commit 21a8e06a5ea36d06e4f8509b8194f73233704f77.
Minor fix in phpdoc in Colors. In Image added ability to copy region of image (alternative to clone->crop), added methods expand and copyRegion (same as crop without some not needed parameters). Added colors_demo.php to examples