updated icons, with vector gradient background
Merge branch 'icons' of https://github.com/qreal/qreal into trikDemos

Conflicts:
	plugins/robots/editor/images/iconset1/images/balanceBlock.svg
	plugins/robots/editor/images/iconset1/images/balancelnitBlock.svg
	plugins/robots/editor/images/iconset1/images/beepBlock.svg
	plugins/robots/editor/images/iconset1/images/clearScreenBlock.svg
	plugins/robots/editor/images/iconset1/images/drawCircleBlock.svg
	plugins/robots/editor/images/iconset1/images/drawLineBlock.svg
	plugins/robots/editor/images/iconset1/images/drawPixelBlock.svg
	plugins/robots/editor/images/iconset1/images/drawRectBlock.svg
	plugins/robots/editor/images/iconset1/images/endLoopBlock.svg
	plugins/robots/editor/images/iconset1/images/enginesBackwardBlock.svg
	plugins/robots/editor/images/iconset1/images/enginesForwardBlock.svg
	plugins/robots/editor/images/iconset1/images/finalBlock.svg
	plugins/robots/editor/images/iconset1/images/forkBlock.svg
	plugins/robots/editor/images/iconset1/images/functionBlock.svg
	plugins/robots/editor/images/iconset1/images/ifBlock.svg
	plugins/robots/editor/images/iconset1/images/initialBlock.svg
	plugins/robots/editor/images/iconset1/images/ledBlock.svg
	plugins/robots/editor/images/iconset1/images/nullificationEncoderBlock.svg
	plugins/robots/editor/images/iconset1/images/playToneBlock.svg
	plugins/robots/editor/images/iconset1/images/printTextBlock.svg
	plugins/robots/editor/images/iconset1/images/sadSmileBlock.svg
	plugins/robots/editor/images/iconset1/images/setBackgroundBlock.svg
	plugins/robots/editor/images/iconset1/images/smileBlock.svg
	plugins/robots/editor/images/iconset1/images/startLoopBlock.svg
	plugins/robots/editor/images/iconset1/images/subprogramRobotsBlock.svg
	plugins/robots/editor/images/iconset1/images/talkBlock.svg
	plugins/robots/editor/images/iconset1/images/timerBlock.svg
	plugins/robots/editor/images/iconset1/images/waitForAccelerometerBlock.svg
	plugins/robots/editor/images/iconset1/images/waitForButtonsBlock.svg
	plugins/robots/editor/images/iconset1/images/waitForColorBlock.svg
	plugins/robots/editor/images/iconset1/images/waitForColorIntensityBlock.svg
	plugins/robots/editor/images/iconset1/images/waitForEncoderBlock.svg
	plugins/robots/editor/images/iconset1/images/waitForGyroscopeBlock.svg
	plugins/robots/editor/images/iconset1/images/waitForSonarDistanceBlock.svg
	plugins/robots/editor/images/iconset1/images/waitForSoundSensorBlock.svg
	plugins/robots/editor/images/iconset1/images/waitForTouchSensorBlock.svg