Significant testing, updating unit tests and updates to the docs.

Readme.md

doc/en/About/The_philosophy_of_STACK.md

doc/en/About/index.md

doc/en/CAS/Equivalence_reasoning.md

doc/en/CAS/Inequalities.md

doc/en/Developer/Development_history.md

doc/en/Developer/Development_track.md

doc/en/Developer/Future_plans.md

doc/en/Students/Equivalence_reasoning.md

doc/en/index.md

questiontestedit.php

samplequestions/STACK-demo.mbz

stack/maxima/experimental.mac

stack/maxima/inequalities.mac

stack/maxima/intervals.mac

stack/maxima/rtest_experimental.mac

stack/maxima/rtest_inequalities.mac

stack/maxima/rtest_intervals.mac

stack/maxima/stackmaxima.mac

stack/maxima/unittests_load.mac