Apps are free to enable attribute arrays and then dump the state before
binding a buffer via vertexAttribPointer. The state dumping code should
recognize this and avoid calling glGetBufferParameter since passing 0
(an invalid buffer) is an error.

Change-Id: Id3434b914281e9bd9d7157554ab6ef59558e292f
Reviewed-by: Pasi Keränen <pasi.keranen@digia.com>

Headers corrected. Bad examples removed. 3rd party code moved to it's own folder.

Change-Id: Ia8def81fb45f4f6fe99611e92b128f0c72b80a91
Reviewed-by: Tomi Korpipää <tomi.korpipaa@digia.com>
Reviewed-by: Pasi Keränen <pasi.keranen@digia.com>

This commit breaks compatibility with Qt 5.4 and earlier versions. It removes the
temporary QObject based TypedArrays and moves the code to use the native
QV4::TypedArray support in Qt 5.5. This allows the implementation now to also
add support for compressed textures and support all getParameter() values.

Change-Id: I637083e8ebad46b77617ca4095cefaa5aab48b0b
Reviewed-by: Pasi Keränen <pasi.keranen@digia.com>

Change-Id: Ib1ada2b821c574333f726b7228c430876a49856a
Reviewed-by: Pasi Keränen <pasi.keranen@digia.com>

Added QTCANVAS3D_gl_state_dump extension for dumping the current GL state for debugging purposes and added example use to jsonmodels example.
Fixed documentation issues and removed invalid comments related to render thread.

Change-Id: Ib4a81370bf2673a5bfb412038148646638f723a9
Reviewed-by: Tomi Korpipää <tomi.korpipaa@digia.com>
Reviewed-by: Pasi Keränen <pasi.keranen@digia.com>