[Lua] Removed lua simulation support
Updated lua README file to reflect current state of SG - File small_platform.xml was moved to a different location - Added full example for execution; without it, it doesn't work.
Update README of Lua examples
lua examples git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/simgrid/simgrid/trunk@7478 48e7efb5-ca39-0410-a469-dd3cf9ba447f