this flag was never actually doing what I thought it was in the first
place.
Also fix up a few instances of cacheDir still be used in config files
fixes#45
The imageproxy command no longer uses the in-memory cache by default.
Instead, no caching is enabled by default and the in-memory cache can be
enabled by passing `-cache memory`.
The -cache flag also supports specifying directories, and therefore
replaces hte older -cacheDir flag. cacheDir is still supported for
compatibility, but is deprecated and will be removed in the future.
This also sets us up to add support for additional caching backends in
the future.
Partial fix for #49.
Installing the server should be as simple as `go get`, and running it should be as simple as executing the compiled binary. The previous option was a bit round-about.
GitHub uses their own image proxy (camo), which the example images were
linking to. Switch to an explicit link, so that the full exmaple URL
can be seen.
