Ensure that attempts to update route's path are properly handled
with a HTTP error. Moreover, updates swagger file to make it
explicit that routes are immutable.
Fixes#381
* moving documentation around to be more clear and easier to browse
- moved assets into their own directory and updated links to them
- moved operating docs into their own directory
- consolidated kubernetes docs
- added docker-swarm folder for docs
- updated docs layout in docs/README.md to reflect the changes and make it easier to read
* docs: s/Operating Functions/Operating IronFunctions/
* docs: removing duplicate database link
* docs: moving databases into general docs
* docs: moving databases/mqs back
* docs: removing memory.md (duplicate of operating/routes.md)
* docs: converting to markdown bullets
* More doc updates, explanation of serverless.
* Moved howto directory to examples and some minor doc updates.
* Added apps and routes docs.
* Fixes for Carlos' comments.
* Added bit about importing lambda functions.
