Added a test case for bug #777 (which is PHP bug #61079).

https://bugs.php.net/bug.php?id=61079
Fixed compilation with ZTS on PHP < 5.3
Merge branch 'xdebug_2_1'
Added a test case for issue #763.
Merge branch 'xdebug_2_1'
Merge branch 'issue777-problems-with-mysqli-and-context-get' into xdebug_2_1
Merge branch 'xdebug_2_1'
Fixed issue #756: Added support for ZEND_*_*_OBJ and self::*.
Merge branch 'xdebug_2_1'

Conflicts:
	xdebug_code_coverage.c
	xdebug_var.c
Test cases for bug #757 (which is not a bug).
Merge branch 'xdebug_2_1'
Fixed issue #744: new lines in a PHP file from Windows are displayed with an extra white line with var_dump().
Merge branch 'xdebug_2_1'
Merge branch 'master' of github.com:derickr/xdebug
Merge branch 'xdebug_2_1' of github.com:derickr/xdebug into xdebug_2_1
Merge branch 'xdebug_2_1'
Add a error-specific class to stack traces.
Fixed test cases.
Merge branch 'xdebug_2_1'
Merge branch 'xdebug-stack-error-class'