copy: simplify inner copy - save dirstate lookup and exists check - do all fs work inside a single dryrun clause - move unlinking into inner copy section - move target dir creation - eliminate undelete mess - fix a bug on mv a -> b -> a after merge

copy: minor cleanups - add after and dryrun variables - add some comments

copy: propagate errors properly

copy: refactor okaytocopy into walkpat - rename core copy function to copyfile - move origsrc details into copyfile - turn okaytocopy loop into walkpat

copy: fix copying back with -A (issue836)

hgwebdir: refactor inner loop

hgwebdir: split out templater creation

hgwebdir: split out makeindex function, facilitate test failure diagnosis

hgweb: explicitly pass around the templater

hgweb: split out templater definition

separate the wire protocol commands from the user interface commands

hgweb: extract constant to global level

hgweb: get rid of some nested functions

fix some imports; pushing bz2 bundles over http is currently untested