Removed StaticArray#new. To create one you need to specify the initial value of each element either via a single value or a block (similar to Array). Can still use "::" to declare on stack (more efficient but unsafe)

Renamed Pointer#memcpy and Pointer#memmove to copy_from and move_from. Also added copy_to and move_to.

Add Ubuntu dependencies. Use --run instead of &&

Added Slice and use that in IO. For now there are no extra checks. Also: fixed some things in the compiler and added Enumerable#join(separator, io, &block)