ClassDefintion fix uncurrect way to set abstract for interface

- In stubs interfaces is abstract interfaces

- It is not good way
Added demo for #493 issue
Fetch class entry name for zephir_get_internal_ce
Added simple test with memcache class for #493
Skip test if not phalcon ext loaded
Added Phalcon\Mvc\Application prototype for CI test
Load prototypes fix
Regenerate source
Merge pull request #610 from ovr/stubs_interfaces

ClassDefintion fix incorrect way to set abstract for interface
Fixes #611
Merge branch 'master' of http://github.com/phalcon/zephir
Fix va_list usage, or it will not work the right way on Windows
Merge pull request #615 from hylent/va_list

Fix va_list usage, or it will not work the right way on Windows
Implement array-append on static properties
Merge pull request #620 from steffengy/static-prop

Implement array-append on static properties
Add array_fill to read-only methods to fix segmentation fault
Merge pull request #621 from steffengy/fix-arrayfill

Add array_fill to read-only methods to fix segmentation fault
Stub generation fixes
Fix isset by passing dynamic access variables as "no local", execute tests
Merge pull request #623 from steffengy/fix-isset

Fix isset operator to promote local-variables and execute isset tests