v0.1.0: Fix byteReader issue (#7)

* add failing test case with flate.Reader

* fix local byteReader implementation -- fixes #6

* ReadByte() : if a byte is read, store the error, and returned the byte
  with no error
* if an error is stored, return it (from ReadByte() or Read())

* ignore error in ReadByte if reader returns 1 byte

following discussion on PR #7

* fix typo

Co-authored-by: Agniva De Sarker <agnivade@yahoo.co.in>