v0.1.7

#5 added specialized unread functions to binary helper module
#12 improved simple JSON mapper
#15 added writer.writeAll(_, data) method
#16 fixed bugs in binary helper module.
#17 fixed reader.nodify() for streamline fast mode.
#18 fixed exception when passing null options to child_process reader.
#14 added reader.tee(writer) method
#19 added reader.dup() method
#20 moved database support to separate packages