Huckle

- Give help precedence over parameter navigation so that help can be easily available at all times

- Give precedence to parameter navigation if present so that we can avoid double quoting param on the command line

- Fix SIGPIPE signal that causes huckle to crash prematurely
- Update install instructions to remove Python's pip installation
- Update to handle removal of an already removed cli
- Update README links to hcli.io to http from https
- Fix bug that prevents post when there's no input stream to send to the server

- Fix python 2 vs python 3 urllib quote defect

- Add support for passing quoted HCLI parameters
- Update to requests 2.21.0
- Add very large stdin streaming support
- Fix man page output to properly break on carriage return character from hcli-document json
- Removed EXAMPLES section sequence constraint on COMMANDS and OPTIONS output
- Add support for python 3.7 xenial
- Add auto discovery of cli link relations on attempted CLI installation from a root resource that isn't an hcli-document

- Switched to huckle cli ls from huckle cli list for brevity
- Switched to huckle cli config <cliname> from huckle cli config list <cliname> for brevity
- Added more examples in the huckle man page
- Cleaned up the README
- Added a note on disgraceful handling of cli invocation to the README (when an HCLI service is down)