add md file in examples dir that lists examples meaningful to test webgl
add md file in examples dir that lists examples meaningful to test webgl

Karel-van-de-Plassche/bokeh,azjps/bokeh,dennisobrien/bokeh,draperjames/bokeh,stonebig/bokeh,aavanian/bokeh,stonebig/bokeh,ericmjl/bokeh,clairetang6/bokeh,ptitjano/bokeh,clairetang6/bokeh,DuCorey/bokeh,percyfal/bokeh,aavanian/bokeh,rs2/bokeh,percyfal/bokeh,aavanian/bokeh,DuCorey/bokeh,mindriot101/bokeh,ptitjano/bokeh,justacec/bokeh,schoolie/bokeh,aavanian/bokeh,azjps/bokeh,phobson/bokeh,Karel-van-de-Plassche/bokeh,clairetang6/bokeh,jakirkham/bokeh,ericmjl/bokeh,mindriot101/bokeh,quasiben/bokeh,ptitjano/bokeh,schoolie/bokeh,DuCorey/bokeh,percyfal/bokeh,schoolie/bokeh,aiguofer/bokeh,clairetang6/bokeh,bokeh/bokeh,draperjames/bokeh,schoolie/bokeh,aiguofer/bokeh,dennisobrien/bokeh,percyfal/bokeh,quasiben/bokeh,ptitjano/bokeh,bokeh/bokeh,quasiben/bokeh,jakirkham/bokeh,dennisobrien/bokeh,DuCorey/bokeh,philippjfr/bokeh,timsnyder/bokeh,phobson/bokeh,rs2/bokeh,schoolie/bokeh,philippjfr/bokeh,aiguofer/bokeh,phobson/bokeh,draperjames/bokeh,bokeh/bokeh,ericmjl/bokeh,jakirkham/bokeh,justacec/bokeh,ptitjano/bokeh,timsnyder/bokeh,jakirkham/bokeh,stonebig/bokeh,DuCorey/bokeh,phobson/bokeh,philippjfr/bokeh,justacec/bokeh,mindriot101/bokeh,bokeh/bokeh,dennisobrien/bokeh,Karel-van-de-Plassche/bokeh,rs2/bokeh,azjps/bokeh,ericmjl/bokeh,aiguofer/bokeh,Karel-van-de-Plassche/bokeh,azjps/bokeh,timsnyder/bokeh,timsnyder/bokeh,rs2/bokeh,rs2/bokeh,aavanian/bokeh,dennisobrien/bokeh,justacec/bokeh,Karel-van-de-Plassche/bokeh,percyfal/bokeh,jakirkham/bokeh,draperjames/bokeh,philippjfr/bokeh,phobson/bokeh,azjps/bokeh,philippjfr/bokeh,bokeh/bokeh,ericmjl/bokeh,timsnyder/bokeh,aiguofer/bokeh,draperjames/bokeh,mindriot101/bokeh,stonebig/bokeh