FCM::Admin::System: hotcopy then verify

Verify the hotcopy instead of the original to ensure the integrity of
the backup.
Also fix `REV.gz` file name sort error.
FCM::Admin::System: remove unnecessary test

$rev is always true.
metomi/fcm#28: update command list
metomi/fcm#28: add missing command
Merge pull request #70 from benfitzpatrick/doc.unwrapped-svn-commands-update

metomi/fcm#28: update Subversion unwrapped command list
Merge pull request #68 from matthewrmshin/fix-admin

FCM::Admin::System: hotcopy then verify
fcm conflicts: fix bug
Merge pull request #72 from benfitzpatrick/fcm-conflicts.fix-18

fcm conflicts: fix 1.8 incompatibility bug
fcm mkpatch: use bash in generated scripts
Merge pull request #73 from matthewrmshin/mkpatch-bash

fcm mkpatch: use bash in generated scripts
Update CHANGES.md
Update CHANGES.md and fcm-version.js for release