hgweb: fix typo and inactive link in page_nav and page_header of gitweb's help

hgweb: add separate bookmarks listing to monoblue theme (based on 38c9837b1f75)

hgweb: fix typo in page-header of monoblue's help template

hgweb: add missing bookmarks templates to atom/rss styles It's already referenced from paper style.

subrepo: process merge substate in sorted order in submerge() This ensures that subrepositories are pulled in a well defined order when cloning the parent repository. BEFORE: $ hg clone http://hg.gerg.ca/allextensions destination directory: allextensions requesting all changes adding changesets adding manifests adding file changes added 10 changesets with 20 changes to 6 files updating to branch default pulling subrepo caseguard from http://bitbucket.org/alexandru/caseguard real URL is https://bitbucket.org/alexandru/caseguard requesting all changes adding changesets adding manifests adding file changes added 81 changesets with 100 changes to 13 files pulling subrepo hg-prompt from http://bitbucket.org/sjl/hg-prompt real URL is https://bitbucket.org/sjl/hg-prompt requesting all changes adding changesets adding manifests adding file changes added 114 changesets with 176 changes to 35 files pulling subrepo hgpaste from http://bitbucket.org/birkenfeld/hgpaste real URL is https://bitbucket.org/birkenfeld/hgpaste requesting all changes adding changesets adding manifests adding file changes added 18 changesets with 18 changes to 2 files ... AFTER: $ hg clone http://hg.gerg.ca/allextensions destination directory: allextensions requesting all changes adding changesets adding manifests adding file changes added 10 changesets with 20 changes to 6 files updating to branch default pulling subrepo Artemis from http://hg.mrzv.org/Artemis requesting all changes adding changesets adding manifests adding file changes added 55 changesets with 108 changes to 47 files ...

rebase: add --tool argument for specifying merge tool