Enforce copyright notices

[dkfellows]

See SpiNNakerManchester/SupportScripts#17

This is the demonstration of what it takes to support RAT and get our house in order. In particular, see the .ratexcludes file and the changes to .travis.yml to call it (java and ant dependency, call support/rat.sh in two stages to set up — download — and do the check — run).

[coveralls]

Pull Request Test Coverage Report for Build 757

• 9 of 15 (60.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-1.1%) to 90.385%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
spinn_utilities/make_tools/file_converter.py	9	15	60.0%

Totals
Change from base Build 748:	-1.1%
Covered Lines:	2040
Relevant Lines:	2257

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💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 837

• 9 of 14 (64.29%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.03%) to 92.457%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
spinn_utilities/make_tools/file_converter.py	9	14	64.29%

Totals
Change from base Build 833:	0.03%
Covered Lines:	2341
Relevant Lines:	2532

---

💛 - Coveralls

[rowleya]

Looks fine to me. Happy for this to be merged if you are ready...