Travis: install cmake earlier.
Travis: install cmake earlier.

drufat/vispy,srinathv/vispy,jay3sh/vispy,inclement/vispy,sbtlaarzc/vispy,kkuunnddaannkk/vispy,julienr/vispy,inclement/vispy,jay3sh/vispy,bollu/vispy,kkuunnddaannkk/vispy,drufat/vispy,ghisvail/vispy,michaelaye/vispy,jdreaver/vispy,inclement/vispy,jdreaver/vispy,bollu/vispy,ghisvail/vispy,QuLogic/vispy,QuLogic/vispy,michaelaye/vispy,kkuunnddaannkk/vispy,Eric89GXL/vispy,dchilds7/Deysha-Star-Formation,RebeccaWPerry/vispy,jdreaver/vispy,bollu/vispy,Eric89GXL/vispy,hronoses/vispy,sbtlaarzc/vispy,drufat/vispy,jay3sh/vispy,sh4wn/vispy,julienr/vispy,michaelaye/vispy,julienr/vispy,RebeccaWPerry/vispy,Eric89GXL/vispy,hronoses/vispy,srinathv/vispy,hronoses/vispy,sbtlaarzc/vispy,sh4wn/vispy,ghisvail/vispy,dchilds7/Deysha-Star-Formation,sh4wn/vispy,srinathv/vispy,RebeccaWPerry/vispy,QuLogic/vispy,dchilds7/Deysha-Star-Formation