Prep version 0.9.8

Bump version to v0.9.7.

bump to version 0.9.6

esky.sudo: monitor helper process to avoid deadlock if it dies

bump to v0.9.4

fix typo (although finding a "god heuristic" would be awesome...)

bump version to 0.9.2

is_core_dependency: allow .so.* files to end in a number

update tutorial for new on-disk layout

prep for v0.8.4