add prechangegroup and pretxnchangegroup hooks.
prechangegroup lets you stop push, pull or unbundle before it begins.
pretxnchangegroup lets you inspect changegroup before transaction is
committed, and roll back if you not like it.
header = header-raw.tmpl
footer = ""
changeset = changeset-raw.tmpl
difflineplus = "#line#"
difflineminus = "#line#"
difflineat = "#line#"
diffline = "#line#"
changesetparent = "# parent: #node#"
changesetchild = "# child: #node#"
filenodelink = ""
filerevision = filerevision-raw.tmpl
fileline = "#line#"
diffblock = "#lines#"
filediff = filediff-raw.tmpl
fileannotate = fileannotate-raw.tmpl
annotateline = "#author#@#rev#: #line#"