Added phalcon_safe_zval_ptr_dtor()
Simplified the grammar and regenerated parsers
Updated .gitignore
Unit test
Disable %c: %y implicit make rule
Support for SELECT ALL/SELECT DISTINCT
Unit tests
Fix unrelated bug in ext/image/adapter.c to compile Phalcon
Merge pull request #1122 from sjinks/issue-1115

[NFR] Allow HAVING without GROUP BY in the query builder