Show abstracts in available command

[HebaruSan]

Problem

Currently the ckan available command prints a module's identifier, latest compatible version, and full name:

$ ckan available | shuf -n 5
* CrewPortraits (1.3.1) - Crew Portraits
* SETI-CareerChallenge (1.3.0.0) - SETI-CareerChallenge
* JSIAdvancedTransparentPods (V0.1.15.0) - JSI Advanced Transparent Pods
* SigmaReplacements-Descriptions (D_v0.2.3) - Sigma Replacements: Descriptions
* NodeAlert (1.1.0) - NodeAlert

If you aren't already familiar with a given mod, this format isn't very helpful in deciding whether to install it. You would have to look up each individual mod to get more information.

Change

Now a new --detail option is available to add the abstract (short description) to the end of each line:

$ ckan available --detail | shuf -n 5
* SearchAndRescue (1:11) - Search And Rescue - A pack of parts for KSP that can be used to build Coast Guard style ships and aircraft
* NEBULADecalsContinued (0.1.1.5) - NEBULA Decals Continued -  STDdM3y.jpg This mod allows to place decals on your crafts!
* KerbalNRAP (1.5.9) - Kerbal NRAP - Procedural Test Weights - Procedural test weights for launchers
* ContractsWindowPlus (8.1) - Contracts Window + - A new, more flexible contract monitoring window.
* ForScience (v1.5.0) - ForScience! - ForScience is autopilot for running, collecting and resetting experiments.

This way you can get a sense of what an unfamiliar mod does. The existing output is left as-is in case scripts are parsing it.

The @-symbol syntax is needed because abstract is a keyword in C#, and the @ allows it to be interpreted as a variable name instead.

[politas]

Can we have a --detail option to turn this on, rather than changing the default behaviour?

[HebaruSan]

OK.