Release v1.1.0

* Add support for FOREACH node type
* Add support for ALLREDUCE node type
* New role model (multi-dimension, a dedicated role type)
* More fine-grained expressions (add sequence, range type)
* Shorten constant names to be more consistent
* Add new helper functions for setting properties (e.g. called by parser)
* Add configuration for clang_complete
* Debian package version bump (v1.1.0)