Release v1.2.6

• Small fix in description.
• coloring acquisition plot by the step of the objective evaluation.
• Issue #94: Fix constraint violation in anchor generation.
• Added the ability to set the mean function.
• Added x and y labels for plotted graphs.
• Correct typo in RFModel docstring.
• Pull request: fix branch for Issue-244.
• Implementing Probability of Feasibility (PoF) constraint handling.
• Fixed obvious errors in CMA and DIRECT optimizers, added unit tests.
• Caught mismatch between code and spec: constraints.
• Fix a broken link in the web page
• Fix a broken link in the footer.
• Allow users to choose lhs sampling criteria
• correct square root in lower confidence bound acquisition
• Remove unused and add required imports
• Typo in jupyter command
• Avoid cost function ignored warning with LCB acquisition