updated version number in setup to match released version
Addded & tested line slicing functions: readlines, head, tail, lines and csv
Added new parser to support piping and the new line slicing commands.
updated tests for head, tail & lines enhancements
update docs for row slicing and allow writer to handle generators
data coming into writer can either be a list of columns (csv) or
a line generator each requires different output instructions
pep8 compliance
pep8 compliance
Merge branch 'feature/slice_rows' into develop
Merge branch 'release/0.1.7'

Conflicts:
	README.rst
	setup.py
	sq/__init__.py
	sq/reader.py
	sq/sqx.py