Add complex atan
Add complex atan

victorv/arrayfire,victorv/arrayfire,victorv/arrayfire,9prady9/arrayfire,9prady9/arrayfire,umar456/arrayfire,shehzan10/arrayfire,arrayfire/arrayfire,shehzan10/arrayfire,arrayfire/arrayfire,umar456/arrayfire,arrayfire/arrayfire,marbre/arrayfire,shehzan10/arrayfire,umar456/arrayfire,munnybearz/arrayfire,munnybearz/arrayfire,munnybearz/arrayfire,ghisvail/arrayfire,umar456/arrayfire,marbre/arrayfire,merlin-ext/arrayfire,marbre/arrayfire,ghisvail/arrayfire,ghisvail/arrayfire,arrayfire/arrayfire,9prady9/arrayfire,victorv/arrayfire,merlin-ext/arrayfire,shehzan10/arrayfire,9prady9/arrayfire,ghisvail/arrayfire,merlin-ext/arrayfire,merlin-ext/arrayfire,marbre/arrayfire