minor : solution upper bound is delta so change ( little ) run interface
add inner product for mass matrix
compute solution error using a norm based on a reference parameter + use the same parameter to compute estimated error than this used for the true error computation (for max values)
add a new method to compute a lower bound of the coercivity constant, use option crb.scm.use-scm=false to use it
up to lattest changes + fix compilation with boost 1.54
change inner product to use energy norm (for error estimation)
up models (ref parameters)