Scrapli

Add strict key checking to Paramiko and ssh2-python transport
Add ssh known hosts handling
Example updates/cleanup
Readme updates/cleanup

* Readme updates
* Rename containers
* Fix telnet and System ssh login timeouts
* Type/cleanup docstrings for SSH parsing
* SSH config file support for ssh2 and system

-rename -> scrapli
-add test telnet support
-support 3.6+ again (named tuple instead of data class)
-rename result->response and reswizzle
-drop TextFSM off of send command, is available via response object
-regen docs
-remove flush as it seemed useless...
-cleanup docstrings (remove noqa stuff)

Generated docs
Added Netmiko compatibility
Improved/added testing (still needs to be redone a bit to make it easier, but progress!)
Added platform drivers (untested other than IOSXE at this point, but as it is mostly a rip from ssh2net it should be solid)
Add to Makefile
Added docker-compose
Dropped py36 to get data classes to use for the privilege levels
Minor API adds (send_interactive in network driver)

Added a function to print structured result from genie/textfsm + tests