Make "hg log --style=changelog > changelog" work (issue338)
Style files in templates/ now take precedence over current directory.
This can be overridden with --style=./changelog if really neeeded.
Added test for issue338.
default = 'changelog'
header = header-rss.tmpl
changelog = changelog-rss.tmpl
changelogentry = changelogentry-rss.tmpl
filelog = filelog-rss.tmpl
filelogentry = filelogentry-rss.tmpl
tags = tags-rss.tmpl
tagentry = tagentry-rss.tmpl