perf: add getlen getlen will return 1 if perf.stub

perf: add optional rev for perflog and perftemplating

perf: perfparents honor config perf.parentscount

perf: offer perf.stub to only run one loop

perf: improve grammar of gettimer comment

tests: use absolute_import in tinyproxy Thus begins a series of adding absolute_import to a bunch of files for Python 3 compatibility.

tests: use absolulte_import in test-wireproto.py

tests: use absolute_import in test-walkrepo

tests: use absolute_import in hgweberror.py

tests: use absolute_import in hghave.py

tests: use absolute_import for heredoctest.py

tests: use absolute_import in /get-with-headers.py While I was here, I removed condition code for failure to import json. This code was necessary to support Python < 2.6, which didn't include the json module.

tests: use absolute_import in generate-working-copy-states.py

hgweb: move entry-preparing code from webcommands to webutils.commonentry() The new function is used to fill basic information about a ctx, such as revision number and hash, author, commit message, etc. Before, every webcommand used to get this basic information on its own using some boilerplate code, and some things in some places just weren't available.