Support for memory size suffixes [KMGT]

[michalkucharczyk]

Support for common memory suffixes was added. It is now possible to use:

• nKB as a shortcut for n * 1000
• n[K|k|KiB] for n * 1024 (e.g. 1K = 1024)
• n[M|m|MiB] for n * 1024 * 1024 (e.g 2M = 2097152)
• n[G|g|GiB] for n * 1024 * 1024 * 1024
• n[T|t|TiB] for n * 1024 ^ 4
• n[P|p|PiB] for n * 1024 ^ 5
• nEiB for n * 1024 ^ 6