Add .gitmodules for new pyrr submodule
Add .gitmodules for new pyrr submodule

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