Standardize password hash function usage

See https://builds-artifacts.piwik.org/piwik/piwik/master/17471/processed/Login_formless_login.png

To prevent API breakage - see https://github.com/piwik/piwik/pull/9480#discussion-diff-49282923

Display action details in visitor profile (if other than pageviews)

No interaction mode for customvariables:set-max-custom-variables command

Fixes calculation of fillup columns for subtables

Fixes small layout issue in visitor profile

Document need to call setApiUrl() in js/README.md

Adding comment to clarify logic refs https://github.com/piwik/piwik/issues/8128#issuecomment-121523583

For performance reasons

As preparation for Common::hash() changing its hash function some time in future

As preparation for introduction of a stronger hash function in https://github.com/piwik/piwik/issues/5728, this standardizes the usage of the current **password** hash function across the Login and UsersManager plugins. Specifically:

* Use UsersManager::getPasswordHash() throughout, instead of previous direct use of md5() in some places

* Concentrate the hash length sanity check in the newly created UsersManager::checkPasswordHash(). Previously, UsersManager\Auth and Login\PasswordResetter classes did it separately. Both checks were moved into the newly created UsersManager class function, as that is also where other public static password check functions reside.

* Replaced the "md5" string with "hash" in affected variable names and comments

No functional change is intended.

If "js/" is used by the Piwik tracking code instead of "piwik.js" and "piwik.php", Page Overlay won't work unless setApiUrl() is called with its parameter pointing to the root directory of Piwik. See https://piwik.org/docs/page-overlay/#page-overlay-troubleshooting (last bullet point) for details.

Limit plugin name to 40 characters

Fix function header (comment only)

It causes the function being marked red on Github - see https://github.com/piwik/piwik/blob/ecdd6607a9392d911aef44fc7e898546f9548424/plugins/Login/Controller.php#L51

[automatic translation update] Updated 110 strings in 43 languages (nb, tr, ar, bg, bs, ca, cs, da, de, el, es, et, fa, fi, fr, he, id, it, ja, nl, pl, pt-br, pt, ro, ru, sq, sr, sv, ta, th, tl, vi, zh-cn, hi, hu, ko, be, lt, lv, nn, sk, uk, zh-tw)

Refs piwik/piwik-log-analytics#120, adding tests for nginx log hex escaping work around in log-importer

Move config.ini.travis.php to travis-scripts repo.

closes #9275

As requested on https://www.transifex.com/piwik/piwik/translate/#ko/piwik-plugin-actions/42546890