Introducing polymorphic function cache (ported from phalcon 1.3)
Initializing variables in calls to NULL
Adding debug flag to phpunit, using environment CFLAGS if set
Removing extra memory observe in getVariableForObserveOrNullify
Add Zephir\Builder\Statements\LetStatementBuilder
Fix type - unreachable
ClassProperty remove slash before Zephir when use namespace
Fix docblocks