Add support for parsing C++11 =delete and =default

Although this was documented as working, it wasn't implemented
%typemap(default) failed without the idstring changes
Add some C tests using the C++ keyword delete
Correct html references
Fixes for c_delete and c_delete_function tests
Add support for C++11 noexcept specification in exception specifications
Show date in Travis builds
Fix some cases of C++11 exception specifications on constructors with =default or =delete
Merge remote branch 'upstream/master' into perl5-directors-minimal