NXT-0.2.3: dependencies

Dependencies for NXT-0.2.3

library	base (>=4.3 && <5) bytestring (>=0.9 && <1) mtl (>=1.1 && <3) serialport (>=0.4.3 && <1) time (>=1.1 && <2) if !os(windows) unix (>=2.4 && <3)
nxt-shutdown	base (>=4.3 && <5) mtl (>=1.1 && <3) NXT (==0.2.3)
nxt-status	base (>=4.3 && <5) mtl (>=1.1 && <3) NXT (==0.2.3)
nxt-upload	base (>=4.3 && <5) bytestring (>=0.9 && <1) filepath (>=1.1 && <2) mtl (>=1.1 && <3) NXT (==0.2.3)