* Ecosystem pages for the Software Task Group

Files changed:

	* README.md: Simplified, so more appears on first screen.
	* ecosystem/README.md: Created.
	* ecosystem/ashling.md: Created.
	* ecosystem/embecosm.md: Created.
	* ecosystem/ide.md: Created.
	* ecosystem/imperas.md: Created.
	* ecosystem/os.md: Created.
	* ecosystem/simulation.md: Created.
	* ecosystem/thales.md: Created.
	* ecosystem/toolchains.md: Created.

Signed-off-by: Jeremy Bennett <jeremy.bennett@embecosm.com>