Added round, floor, ceil and abs instances to CPU
Added round, floor, ceil and abs instances to CPU

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