Blender Git Loki

remove signature and paramter classes

don't use signature in function anymore

remove more dependencies on signature and parameter types

move more signature logic into function

Merge branch 'master' into functions

use StringRef and ArrayRef in more places

use ArrayRef in more places

use ArrayRef in more places

less usage of InputParameter and OutputParameter type

use new FunctionBuilder instead of creating Signature manually

windows build fix

Rename StridedArrayRef to MappedArrayRef

Merge branch 'master' into functions

initial StringCollection class

use string ref in llvm ir builder

deduplicate string ref code

use string ref in more places

use string ref in more places

use string ref for type names

new StringRefNull class