Improve documentation

[randyzwitch]

Could do more around a full tutorial, document known limitations, etc.

• [x] clean up copyright notice
• [x] remove remaining MapD references from docstrings
• [x] Tagging a new version for PyPI and conda (so future @randyzwitch remembers)
• [x] Setting up dev environment
• [x] Python 3 only starting with version 0.8
• [x] Default ports changed in OmniSci 4.5
• [x] Statement that by default, auto-creating tables uses TEXT ENCODED DICT(32) for text columns
• [x] Fix autodoc docstrings on API page
• [x] Shared memory/IPC methods
• [x] How to connect to cloud / difference between binary and http(s) protocols
• [x] System word size not checked, can overflow when selecting BIGINT column on 32-bit system
• [x] Note decimal limitation when using con.execute, that the result is returned as float
• [x] Highlight timestamps should be uploaded in UTC (will fail columnar if not)
• [ ] full tutorial
• [ ] Working with geospatial data (#115)
• [ ] When to use/not to use various load_table methods (#208)

[randyzwitch]

As people run into different issues, we can add them to the list above to keep track.