Changes from sde_1.9.4 to sde_1.9.5:
------------------------------------

1.  added all examples from charpter 1 and 2; some
	of chapter 3
2.  cleaning of internal C code

Changes from sde_1.8 to sde_1.9.4:
----------------------------------

1.  multiple independet trajectories can be simulated with sde.sim 
	in all methods with the exclusion of EA

2.  all methods are now implemented at C level with the exclusion
	of the EA method

3.  added changes.txt file

