Swedish update, also committed to AMOS.
Merge pull request #40 from alcarola/master

Update of the Swedish translation.
Fix to: https://github.com/maths/moodle-qtype_stack/issues/43
Traducción al español
Sigo probando el uso de Git
Actualización
New feature to facilitate authoring of the general feedback.  This puts a link from the question testing page to the cas chat script.
Functions to catch and reject chains of inequalities such as 1<x<5 in addition to some other strings.
Slightly better error messages.
Further modifications to the 1<x<7 validation.
Code tidy.
Bug fix to casstring validation - improvements to error reporting during question use.
Actualización de traducción
Code tidy only.
Copy translation to es_mx
Form validation: Nothing links to this error shown on wrong node.

OU bug #4928.
PRT 11 onwards displayed out-of-order.

It is only a cosmetic issue, but it does affect usability. Note that
this will break if any nodes have a name that does not look like an
integer, but that does not happen. (Why did I use a CHAR column here?)

OU bug #4924.
Calculus Refresher completed.
Merge branch 'master' of github.com:maths/moodle-qtype_stack
Correct handling of fixed variants on question test edit page.