* Use appveyor.yaml from c++11 branch so that CI run ok.
* Use .travis.yml from the c++ branch so that Travis CI jobs run ok.
* Add c++11 scripts and Linux config so that Travis CI jobs are ok.
* Use mkdocumentation & mkrelease from c++11 branch.
* Use PocoDoc config files from c++11 branch.
* define POCO_ENABLE_C11 as the default
* CMake: ignore Crypto for now. To be fixed since it fails.
* Backport c++11 changes from the c++11 branch
* Add Cygwin config with c++11 setup.
* Update appveyor.yml from c++11 branch.