Added pure real-parameter twistedvalley function

The original twistedvalley.m is renamed to twistedvalleymix.m. The new
twistedvalley.m is a pure real-parameter version of twistedvalley
function.
Draw semilogy for noiseless optimization

Let the tester draw semilogy for noiseless optimization, and draw loglog
for noise optimization.
Shown distances between each pair of solutions

Only projadeeig.m supports this feature currently. One can run
testspecificrun.m to see the distances. The sampledistance.m implements
a soft computing way to measure the distances.