Added simpsa routines (new optimization algorithm)
mode_compute = 10 calls simpsa algorithm.
Provide more sensible lower and upper bounds for simpsa algorithm.
Removed the seed set on clock. Changed default values for the options.
Fixed bug caused by the size of the vector of parameters (transposition needed).
Linked simpsa's tolerance options to dynare's defaults.
Added simpsa optimization algorithm in the manual.
Merge branch 'master' into add-simpsa-optimization-routine