Log Message:
Updated cad/py-gds to 1.1
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### Version 1.1 (Jan 20, 2017)
* Introduction of `GdsLibrary` to allow user to work with multiple library \ 
simultaneously.
* Deprecated `GdsImport` in favor of `GdsLibrary`.
* Renamed `gds_print` to `write_gds` and `GdsPrint` to `GdsWriter`.
* Development changed to Python 3 (Python 2 supported via \ 
[python-future](http://python-future.org/)).
* Added photonics example.
* Added test suite.
* Clipper library updated to last version.
* Fixed `inside` function sometimes reversing the order of the output.
* Fixed rounding error in `fast_boolean`.
* Fixed argument `deep_copy` being inverted in `Cell.copy`.
* Bug fixes introduced by numpy (thanks to Adam McCaughan for the contribution).