> However, when I tried to use the Edit Pages function, there is no "Embed Galaxy Object" and "Insert Link to Galaxy Object" in the "Page Editor". I have set the "enable_pages = True" in "universe_wsgi.ini".
> Wonder what else can cause the problem?

Charlie,

This bug has been fixed in galaxy-central changeset  r5231:642f1f9e5e3a 
 
> Also, is there any documentations for the control syntax used in datatypes and tools configure xmls?

Datatypes: https://bitbucket.org/galaxy/galaxy-central/wiki/AddingDatatypes
Tool config: https://bitbucket.org/galaxy/galaxy-central/wiki/ToolConfigSyntax 

Best,
J.