add an arrow after "more" as per jamsek suggestion

gotwebd: fix briefs/tags navigation overlap Introduces a separate field for the "next" button (now called "More") and adjusted the CSS/HTML so it's used. Finally, drops the old code used to handle the pagination for the BRIEFS/COMMITS cases. Needs a small hack for the time being, setting the action to TAGS. This is due how qs->action is changed in gotweb.c while handling the request. ok jamsek

zap trailing whitespace

another memcmp -> got_object_id_cmp

use got_object_id_cmp instad of memcmp where possible in object_parse.c ok stsp@

typo in comment it serializes the struct got_imsg_tree_entry, not tree_object. grep aid.

add test coverage for new 'got fetch' default behaviour

got: make fetch default to the work tree's current branch As per stsp's todo item, if invoked in a work tree, make 'got fetch' default to fetching the work tree's current branch instead of the branch pointed to by the remote repository's HEAD. ok stsp@ and op@

add a few TODOs for got patch and gotwebd

got_imsg_commit_object: use struct instead of buffer for id ok stsp@

got_imsg_object: use struct instead of buffer for id ok stsp@

cleanup.sh: use `rm -f' to avoid prompting, packfiles are now read-only ok stsp@

got_imsg_send_remote_ref: use struct instead of buffer for id ok stsp@

got_imsg_send_ref: use struct instead of buffer for id ok stsp@

got_imsg_fetch_ref: use struct instead of buffer for id ok stsp@