libemu: Refactor Stack getters/setters
libemu: Remove Stack.size()
libemu: Factor out Libemu.run()
libemu: Factor out Snapshot.log()
libemu: Add missing documentation
emu: Strip Legacy code
libemu: Enforce 80 char width
man: Fix synopsis typesetting
libemu: Ensure stack names match A-Z
libemu: Refactor for 80 char width
libemu: Remove unused Source.verify()
emu/checkout: Add --force option
libemu: Fix Source.checkout()
libemu: Use sha1sum for checksum algorithm
libemu: Fix "Most Recent Backup" link in head()
emu/verify: Colourise output
emu/verify: Verify in reverse chronological order
emu/verify: Fail if no snapshots
libemu: Only set new HEAD when required
emu: Refactor squash into Libemu