Add information package caching.
authorStephen Becker IV <github@deathbyescalator.com>
Wed, 24 Feb 2016 07:23:39 +0000 (23:23 -0800)
committerStephen Becker IV <github@deathbyescalator.com>
Wed, 24 Feb 2016 07:23:39 +0000 (23:23 -0800)
commitfad25b272925c2fe0d607b26ba4d33ea4576d26e
tree6189e3c21a81c059ad8326e781f0b9d981e92889
parent93fb4c02cc5c42fbfd45cc894959e4c6407120bb
Add information package caching.

Per https://github.com/rust-lang/cargo/issues/1609
Added in a single line that states that the cached packages are only
removed by running the clean command.
src/doc/environment-variables.md