Rename unipackage.js to isopack.js
Rename Unipackage to Isopack
Rename unipackage to isopack in almost all cases
Make isopack backwards- and forwards-compatible
Change "unibuilds" property to "builds" in the new isopack.json format
Merge branch 'release-0.9.4' into isopack
Read the file correctly
Rename unipkg to isopk
Add converters and compat with comments
Merge branch 'isopack' into release-0.9.4

Conflicts:
	tools/uniload.js