* Stop building for Windows until the build passes

ERROR: D:/b/bk-windows-java8-bd0z/bazel/flatbuffers/BUILD:123:1: Couldn't build file _objs/flatbuffers_test/test.obj: undeclared inclusion(s) in rule '//:flatbuffers_test':
this rule is missing dependency declarations for the following files included by 'tests/test.cpp':
  'tests/monster_test_generated.h'
  'tests/monster_extra_generated.h'

The files in tests are being found instead of the generated files since
Windows doesn't have any sandboxing.  For now, let's disable the rules
and come back to it.

* Fix buildifier warnings

Clean up docstrings and add a module docstring.