Merge branch 'release-0.34.0' into develop
Updated the news feed source
Multiple changes

- Moved the implementation of one member function of shapes::ObjMesh
  to the library.
- Minor update in shader in OGLplus example.
Reimplemented the all-in-one 'library' include

- Also moved the image data generation and PNG loading-related functions
  to the library.
- Moved the oglplus/image.hpp file to oglplus/images/image.hpp.
Minor update in lib func. implementation
Multiple changes

- Fixed a bug in one of OGLplus' example.
- Updated web index page.
Updates to the cmake build system

- Updated the configuration variables set by the cmake scripts to use ints
  instead of booleans.
- Updated the detection of GL version and GL extensions, the detection
  is now more strict by default.
- Updated the dependencies/requirements of several examples.
- Fixed a bug in configure.py.
- Added the --debug-config option to configure.py.
- Added detection if the 'library' can be built.
Fixed problems with None being defined as PP symbol
Multiple changes

- Added the detection of the ARB_tessellation_shader.
- Updated example dependencies/requirements.
Updated example dependencies
Fixups of GL extension detection
Changes to context/api initialization functions
Minor update to the build system

- Added GL version check for one of the standalone examples.
Minor fixup in the build system

- Reverted one of the changes from two commits ago.
Updated the readme
Minor update to web index page

- Added download link for develop branch snapshot.
Backporting to MSVC

- Added full qualification to AlignedPODArray used in Image.
Started release-0.35.0
Backporting to MSVC

- Fixed an overload selection problem in one of the examples.
Updated the detection of variadic template support