This major commit prepares v2 of lib3mf
- adds the Automatic Component toolkit
  - this removes the COM interface
  - autogenerates language bindings for multiple languages
- reworks the way in which properties are handled
- implementes multiproperties and compositematerials
- adds basic (and automatic) documentation using sphinx / https://readthedocs.org/
- improves/changes lib3mf in multiple other minor ways
- ... but has several open issues left

* add CImportStream_Shared_Memory and CImportStream_Unique_Memory

* Fix bad_alloc -Wcatch-value from GCC 8

* use tab instead of 4 spaces

* increase patch version to 1.8.2

Specify next release to be v1.8.1

* Fix handling of installation dirs using official setup.

* Use project version setting (requires cmake 3.0.2).

* Add options to disable included zlib and libzip.

* Add pkg-config definition.

* Move NMR_COMVersion.h to global .gitignore file to clean up installation.

* Fix version information in the Windows DLL.

* use ole32 when compiling with MINGW in Windows for UUIDs

* use winresrc.h instead of winres.h

* remove ole32 link dependency

* add mingw shell script

* add mingw support to travis-cli

* fix travis before_script

* add cmake cross compile support to cmake

* remove tobydox dependency

* use mingw from /usr instead of  /opt

* remove test from travis mingw build

* remove tets generation for linux mingw

* fix mingw cmake script

* add LIB3MF_TESTS at cmake toolchain

* reenable tests in mingw cmake

* Update GenerateMake.sh

script failed if build path contained space(s)

* Update GenerateCodeLite.sh

script failed if build path contained space(s)

* Update GenerateVS2015.sh

script failed if build path contained space(s)

* Update GenerateVS2015_32bit.sh

script failed if build path contained space(s)

* Update GenerateVS2015_32bit.bat

at martinweismann's request

* Update GenerateVS2015.bat

at martinweismann's request

This way it's actually possible to use cmake-gui and build the library without building tests.

MinGW supports this API and adding libuuid to the Windows build is not
easy as this is part of the util-linux package which has lots of Linux
specific code.

This is tested via MXE based build for OpenSCAD.

- filters
- remove/update different outdated comments and points of contacts