Caravel

Fixed:

- silent failing of `looper rerun`
- `looper summarize` not overwriting the existing summary-related files

Changed:

- `lump` and `lumpn` defaults to 0 and 1, respectively

Added:

- custom summarizers support
- subproject activation and deactivation updates all the `Project` object attributes in the "Process" page
- link to the computing configuration settings in the "Home" page

Changed:

- Use logger instead of printing to the error for logging
- Instead of having the optional `token` section in the config file
allow to use hidden `.caravel_token` to predefine the token
- Change logging levels to 10 (debug) and 20 (info) in debug and normal modes, respectively

Added:

- New `bootstrap` UI
- Back button to each page
- Compute environment configuration page
- Deactivate subproject with a dedicated button
- Use `divvy` for computing environment configuration
- Display `looper` log in the terminal and in a separate page, when finished
- `looper` and `peppy` versions assurance
- New way of `caravel`, `looper` and `python` versions monitoring on the client side in the footer
- Systematic HTML form elements determination based on `looper` arguments options
- The port that the server will be run on can be determined manually from the CLI (`-p` and `--port` options)
- Seamless integration with `looper` reporting module, the pages are displayed with `caravel`'s navbar and footer

Changed:

- Fixed a bug that prevented command options from populating (caravel now uses looper's command line parser)
- Fixed a bug that required re-starting with token upon any errors.
- Allow for activating subprojects using new `peppy` method.

Added:

- Allow setting the authentication token in the caravel config file

Added:

- First semi-functional release of caravel.