added new setter from x0, from array of double
added missing doc on set_sep()
added ability to mark a function parameter as fixed at any time during optimization
added support for noisy functions, with slight changes in default parameters + noisy bbob benchmark exe, fixes #17
make initial search starting point and sigma mandatory as parameters, thus given by user, ref #39
Merge branch 'master' into minos

Conflicts:
	tests/test-functions.cc