restructure init files, add optional --user flag for export

export/upstart/master.conf.erb

@@ -2,12 +2,6 @@ pre-start script
 
 bash << "EOF"
   mkdir -p /var/log/<%= app %>
-
-  <% engine.processes.keys.sort.each do |process| %>
-    <% 1.upto(concurrency[process]).each do |num| %>
-      start <%=app%>-<%=process%>-<%=num%>
-    <% end %>
-  <% end %>
 EOF
 
 end script

export/upstart/process.conf.erb

@@ -1,5 +1,6 @@
-stop on stopping <%= app %>
+start on starting <%= app %>-<%= process.name %>
+stop on stopping <%= app %>-<%= process.name %>
 respawn
 
 chdir <%= engine.directory %>
-exec <%= process.command %> >> /var/log/<%=app%>/<%=process.name%>-<%=num%>.log 2>&1
+exec sudo -u <%= user %> <%= process.command %> >> /var/log/<%=app%>/<%=process.name%>-<%=num%>.log 2>&1

export/upstart/process_master.conf.erb

@@ -0,0 +1,2 @@
+start on starting <%= app %>
+stop on stopping <%= app %>