Squashed commit of the following:

commit 95effe9b2582a7eb878ccb8cb9ef51dfc5bbfde7
Author: Evan Hunt <each@isc.org>
Date:   Tue Jun 10 16:52:45 2014 -0700

    [rt10686] move version() to dnssectool.c

commit df205b541d1572ea5306a5f671af8b54b9c5c770
Author: Mukund Sivaraman <muks@isc.org>
Date:   Tue Jun 10 21:38:31 2014 +0530

    Rearrange order of cases

commit cfd30893f2540bf9d607e1fd37545ea7b441e0d0
Author: Mukund Sivaraman <muks@isc.org>
Date:   Tue Jun 10 21:38:08 2014 +0530

    Add version printer to dnssec-verify

commit a625ea338c74ab5e21634033ef87f170ba37fdbe
Author: Mukund Sivaraman <muks@isc.org>
Date:   Tue Jun 10 21:32:19 2014 +0530

    Add version printer to dnssec-signzone

commit d91e1c0f0697b3304ffa46fccc66af65591040d9
Author: Mukund Sivaraman <muks@isc.org>
Date:   Tue Jun 10 21:26:01 2014 +0530

    Add version printer to dnssec-settime

commit 46fc8775da3e13725c31d13e090b406d69b8694f
Author: Mukund Sivaraman <muks@isc.org>
Date:   Tue Jun 10 21:25:48 2014 +0530

    Fix docbook

commit 8123d2efbd84cdfcbc70403aa9bb27b96921bab2
Author: Mukund Sivaraman <muks@isc.org>
Date:   Tue Jun 10 21:20:17 2014 +0530

    Add version printer to dnssec-revoke

commit d0916420317d3e8c69cf1b37d2209ea2d072b913
Author: Mukund Sivaraman <muks@isc.org>
Date:   Tue Jun 10 21:17:54 2014 +0530

    Add version printer to dnssec-keygen

commit 93b0bd5ebc043298dc7d8f446ea543cb40eaecf8
Author: Mukund Sivaraman <muks@isc.org>
Date:   Tue Jun 10 21:14:11 2014 +0530

    Add version printer to dnssec-keyfromlabel

commit 07001bcd9ae2d7b09dd9e243b0ab35307290d05d
Author: Mukund Sivaraman <muks@isc.org>
Date:   Tue Jun 10 21:13:39 2014 +0530

    Update usage help output, docbook

commit 85cdd702f41c96fbc767fc689d1ed97fe1f3a926
Author: Mukund Sivaraman <muks@isc.org>
Date:   Tue Jun 10 21:07:18 2014 +0530

    Add version printer to dnssec-importkey

commit 9274fc61e38205aad561edf445940b4e73d788dc
Author: Mukund Sivaraman <muks@isc.org>
Date:   Tue Jun 10 21:01:53 2014 +0530

    Add version printer to dnssec-dsfromkey

commit bf4605ea2d7282e751fd73489627cc8a99f45a90
Author: Mukund Sivaraman <muks@isc.org>
Date:   Tue Jun 10 20:49:22 2014 +0530

    Add -V to nsupdate usage output