Added out fo date warning in readme
An aeroelastic analysis package
__WORK STILL IN PROGRESS__
+__THIS README IS OUT OF DATE__
sharpy depends on [xbeam](http://github.com/imperialcollegelondon/xbeam) and [UVLM](http://github.com/imperialcollegelondon/UVLM).
For now, only structural simulations are supported.
