removed EI and corresponding test from support (is an acquisition function now)
entropy_search: made class pickable
expected_improvement: fixed a small bug
optsizechooser: restructured for better parallel processing
gp_model: added getAmplitude()
general_tests: added TODO to test reentrant capability of acquisition funcs
gp_test: refactored
pmin_discretiation_test: refactored
entropy_search_big_data: a first proposal (not tested yet)
test_opt_size_chooser: added testcase for minimization
ei_test: copied deleted EI test there
general_tests: abstract class for tests (common set up routine)