Solves issue where __autoload cannot be used on PHP 7.2.

Cache files now use PHP to avoid being readable. We also prevent access with .htaccess (for the common Apache setup).

Load process modules as early as possible for after_db_init plugins

Updated htmLawed to v1.2.4.1 - 12 September 2017.

Fixes #575

Bug Fix:
1.2.4.1 - 12 September 2017. Corrects a function re-declaration bug introduced in version 1.2.4

Above file taken from http://www.bioinformatics.org/phplabware/internal_utilities/htmLawed/

Updated Travis build status image link

Success message for successful unsubscribe

Success message for successful unsubscribe - instead error

Closes #568

Fix non-ANSI group-by queries

Change default theme setting to SnowFlat

Fix for #550, RTL layout vote disply issue.

Repeated color value in .qa-ask-box, removed

Solution provided by fara, I verified fix on test site and it is working fine for RTL layout.
https://github.com/q2a/question2answer/issues/550

Fix points recalculation when turning answers to comments

Fixes #540

merge 1.8

Fix table counts during Q2A installation

Fix #542

Also add canonical tag to question lists and tag pages.