random search

• Adding random search by uniformly sampling parameter values between boundary min and max.
• Adding getLoss function to calculate the loss for a specific parameter set, e.g. the initial parameters.

requested review from @n.bluhme

assigned to @n.bluhme

added 3 commits

• 7d4025f9 - 1 commit from branch se.gorbunov:master
• e56fcb1f - add random search
• 7dc6615a - move getLoss implementation into header

Compare with previous version

merged