Merge pull request #3394 from tacaswell/input_type_faq

DOC : add note about np.matrix and pandas objects
Merge pull request #3397 from tacaswell/install_guide_tweaks

Install guide tweaks
Merge pull request #3399 from jenshnielsen/cherrypick-v140

Cherrypick doc changes to v1.4.x
enlarge on windows build instructions