Merge branch 'release-m4.3'
Update README.md

Change log for 4.3
Merge branch 'develop'
Update README.md

Fixed date
Update README.md

Added link to gangnam demo
Merge branch 'develop'
Update README.md

Added Change log for 4.4 release.
Improved way to calculate dynamic near/far clip planes
Set minimum of near plan to 0.01

Can cause troubles on some older mobile devices that require 1 as minimum to work correctly.
But 1 is to much for many scenes.
Fixed bug: Did not update projection matrix if other pass used different aspect ratio.

Includes test.
Adapted some test cases to HTML (to implicitly test HTML capabilities)
Added test for viewpoints.
Modified getFormatData to support Web Workers for format parsing.

Instead of immediately returning the converted format, a callback
can be called to return the converted document data.
Added option for FormatHandler to return error on getFormatData.
Adapted XML3DJSonFormat to not cache original JSON source.

JSON is converted to Xflow node inside of getFormatData.
That way, only the Xflow node is cached, not the JSON
Added plugins.
Added test for changes in shader overrides
Fixed bug updating element buffers

Conversion to Uint16Array was missing
Deleted obsolete TextureRenderAdapter
More shader override tests

Includes changes of entries that trigger a recompilation of the shader