Configurable Caskroom location, see #475

[halo]

No description provided.

[nanoxd]

@halo Can you write a test for this change?

[halo]

Sorry, I simply forgot. I added the test now, it's basically the same as for the --appdir flag.

Finished tests in 667.799174s, 1.5693 tests/s, 4.4579 assertions/s.
1048 tests, 2977 assertions, 0 failures, 0 errors, 0 skips

[passcod]

It would imo be better to use a new wiki page for option descriptions, or a section on an existing one. Additionally, why would that option be given more visibility than the others, by having it as example? Is it really going to be the one most people look for? Do we even have data on this? Examples need not be random, they can have an agenda, make sure it's not wasted on something few people will engage with, maybe?

[halo]

Ah, good points good points. I will come up with something.

[halo]

What do you think? You can see the results here. I thought about adding a wiki page, but I think it's clearer to have everything at your fingertips in the very same revision control.

[phinze]

This is great @halo - thanks for you work on this! Merging now.