Mercurial: add aliases for 'incoming' and 'outgoing' commands

plugins/mercurial/mercurial.plugin.zsh

@@ -7,7 +7,9 @@ alias hgco='hg checkout'
 alias hgd='hg diff'
 alias hged='hg diffmerge'
 # pull and update
+alias hgi='hg incoming'
 alias hgl='hg pull -u'
+alias hgo='hg outgoing'
 alias hgp='hg push'
 alias hgs='hg status'
 # this is the 'git commit --amend' equivalent