Create mssql2012.sql

replace sp_dboption with new instructions
Merge pull request #119 from Mikhail-D/patch-1

Create mssql2012.sql
fix use of virtual nodetree
bind values for get_parentnodes_tree
Add access rule to mod_roster (EJAB-72)
remove version.tex file which is auto-generated
Add ejabberd_xmlrpc
Fix some type specs and errors