templater: raise nested functions

templater: cache full tree store the parsed version of subtemplates in higher level parse lists, avoid run-time cache lookups

templater: use recursive flattening This avoids slow list operations compared to the iterative version

templater: cache self.defaults.get

templater: privatize class variables

templater: map -> mapping

templater: extend preparsing preparse filters and formats and supply functions to apply

templater: preparse templates and cache This breaks templates down into a list of literal and {} groups, with group types preidentified.

keywords: build a new templater to work around caching interaction

templater: directly parse templates, no regexes

logo: clean up source file with scour

contrib: drop rewrite-revlog

contrib: drop git-viz

merge with stable

add a test for the inprocess status dirstate race

merge with stable