0.3 Release

Chunks and async workers for home/thumb cache (with no early exit).
Implement a loading animation spinner thingy.
Use grouping for the 2 parts of homecache function and fix its accounting.
( Start loading animation earlier^ )
Preload sudo cred (sudo -v, wrapper, plus elses) in places to keep clean output.
Fallbacks for reads (|| _mc_diff=0).
Tighten 'invalid option' and 'supported longs'.
Add minor (cache clear skip) support for aura, aurutils, pakku.