Updated README.md
Updated README.md

Added OSX build status
bkloppenborg/arrayfire,umar456/arrayfire,0x0all/arrayfire,victorv/arrayfire,pentschev/arrayfire,hshindo/arrayfire,glehmann/arrayfire,munnybearz/arrayfire,bkloppenborg/arrayfire,marbre/arrayfire,victorv/arrayfire,HolyGeneralK/arrayfire,ghisvail/arrayfire,Keno/arrayfire,jramapuram/arrayfire,merlin-ext/arrayfire,pavanky/arrayfire,asifmadnan/arrayfire,linan7788626/arrayfire,munnybearz/arrayfire,linan7788626/arrayfire,glehmann/arrayfire,victorv/arrayfire,merlin-ext/arrayfire,Keno/arrayfire,ghisvail/arrayfire,9prady9/arrayfire,kylelutz/arrayfire,pavanky/arrayfire,pentschev/arrayfire,pombredanne/arrayfire,pombredanne/arrayfire,munnybearz/arrayfire,pombredanne/arrayfire,9prady9/arrayfire,mrgloom/arrayfire,ghisvail/arrayfire,pavanky/arrayfire,bkloppenborg/arrayfire,9prady9/arrayfire,marbre/arrayfire,shehzan10/arrayfire,merlin-ext/arrayfire,mrgloom/arrayfire,arrayfire/arrayfire,asifmadnan/arrayfire,arrayfire/arrayfire,jramapuram/arrayfire,umar456/arrayfire,hshindo/arrayfire,0x0all/arrayfire,pentschev/arrayfire,victorv/arrayfire,jramapuram/arrayfire,shehzan10/arrayfire,umar456/arrayfire,shehzan10/arrayfire,asifmadnan/arrayfire,Keno/arrayfire,9prady9/arrayfire,pentschev/arrayfire,asifmadnan/arrayfire,unbornchikken/arrayfire,ghisvail/arrayfire,unbornchikken/arrayfire,HolyGeneralK/arrayfire,unbornchikken/arrayfire,pavanky/arrayfire,pombredanne/arrayfire,hshindo/arrayfire,HolyGeneralK/arrayfire,umar456/arrayfire,jramapuram/arrayfire,linan7788626/arrayfire,arrayfire/arrayfire,kylelutz/arrayfire,hshindo/arrayfire,Keno/arrayfire,bkloppenborg/arrayfire,marbre/arrayfire,mrgloom/arrayfire,unbornchikken/arrayfire,linan7788626/arrayfire,arrayfire/arrayfire,merlin-ext/arrayfire,shehzan10/arrayfire,HolyGeneralK/arrayfire,mrgloom/arrayfire,marbre/arrayfire