Add fio CLI.

Like Rasterio's rio.

Has an experimental implementation of GeoJSON text sequences in
rio translate.
Oops, 1.1.6 was the right version.
Add CLI doc.
Doc fixes.
Better underscore syntax.
Remove trailing whitespace from fio.
Document collection indexing.
Install libgdal1h.
Always report schema prop width and precision.

Closes #123.
Write datetime properties of features.

This probably hasn't worked in a while. Now we have a proper test.
TBD: accept Python datetime objects as well as strings?

Closes #125.
Make Cython requirement more explicit (#127)
Remove empty dependencies section.
Addition of info and insp commands, README overhaul.
add support for slice and possible read cursor modification checks
remove unecessary argument
remove get_feature from session
remove whitspace
python3 modification
reset spatial filter when no bounding box given
Accept datetime.date objects when field type is 'date'