Update the documentation's copyright year... it's 2017.

[pelson]

Tested to include the year when building.

[bjlittle]

@pelson LGTM 👍

Rebase once #2616 is merged and we can bank this, thanks!

[pelson]

Lots of tests timing out (as per #2618). One peculiar failure that I'm not able to reproduce locally:

======================================================================
FAIL: test_pep8_conformance (iris.tests.test_coding_standards.TestCodeFormat)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/travis/miniconda/envs/test-environment/lib/python2.7/site-packages/Iris-2.0.0.dev0-py2.7-linux-x86_64.egg/iris/tests/test_coding_standards.py", line 219, in test_pep8_conformance
    '{}'.format('\n  '.join(unexpectedly_good)))
AssertionError: Some exclude patterns were unnecessary as the files they pointed to either passed the PEP8 tests or do not point to a file:
  */iris/analysis/_interpolate_private.py
  */iris/fileformats/_pyke_rules/compiled_krb/compiled_pyke_files.py
  */iris/fileformats/_pyke_rules/compiled_krb/fc_rules_cf_fc.py
  */iris/fileformats/grib/_grib1_load_rules.py
  */iris/fileformats/grib/_grib_cf_map.py
  */iris/fileformats/pp_rules.py
  */iris/fileformats/rules.py
  */iris/fileformats/um_cf_map.py
  */iris/io/__init__.py
  */iris/io/format_picker.py
  */iris/tests/__init__.py
  */iris/tests/pp.py
  */iris/tests/stock.py
  */iris/tests/system_test.py
  */iris/tests/test_analysis.py
  */iris/tests/test_analysis_calculus.py
  */iris/tests/test_basic_maths.py
  */iris/tests/test_cartography.py
  */iris/tests/test_cdm.py
  */iris/tests/test_cell.py
  */iris/tests/test_cf.py
  */iris/tests/test_constraints.py
  */iris/tests/test_coord_api.py
  */iris/tests/test_coord_categorisation.py
  */iris/tests/test_coordsystem.py
  */iris/tests/test_cube_to_pp.py
  */iris/tests/test_file_load.py
  */iris/tests/test_file_save.py
  */iris/tests/test_grib_save.py
  */iris/tests/test_grib_save_rules.py
  */iris/tests/test_hybrid.py
  */iris/tests/test_interpolation.py
  */iris/tests/test_intersect.py
  */iris/tests/test_io_init.py
  */iris/tests/test_iterate.py
  */iris/tests/test_load.py
  */iris/tests/test_merge.py
  */iris/tests/test_pp_cf.py
  */iris/tests/test_pp_module.py
  */iris/tests/test_pp_stash.py
  */iris/tests/test_pp_to_cube.py
  */iris/tests/test_quickplot.py
  */iris/tests/test_regrid.py
  */iris/tests/test_std_names.py
  */iris/tests/test_unit.py
  */iris/tests/test_uri_callback.py
  */iris/tests/test_util.py
  */src/conf.py
  */src/developers_guide/gitwash_dumper.py

[pelson]

https://scitools-docs.github.io/iris/master/ now shows the correct year! 👍