Hooks

- Removed all obsolete hooks, except from commands.cpp, which is being
  worked on in parallel.
- Implemented new on-launch and on-exit unit tests.

test/hook.on-exit.t

@@ -35,7 +35,7 @@ if (open my $fh, '>', 'hook.rc')
 {
   print $fh "data.location=.\n",
             "hooks=on\n",
-            "hook.pre-exit=" . $ENV{'PWD'} . "/hook:test\n";
+            "hook.on-exit=" . $ENV{'PWD'} . "/hook:test\n";
   close $fh;
   ok (-r 'hook.rc', 'Created hook.rc');
 }

test/hook.on-launch.t

@@ -35,7 +35,7 @@ if (open my $fh, '>', 'hook.rc')
 {
   print $fh "data.location=.\n",
             "hooks=on\n",
-            "hook.post-start=" . $ENV{'PWD'} . "/hook:test\n";
+            "hook.on-launch=" . $ENV{'PWD'} . "/hook:test\n";
   close $fh;
   ok (-r 'hook.rc', 'Created hook.rc');
 }