+/**
+ * This function builds an array with all the information about
+ * the options available to the user, and returns it. The options
+ * are grouped by the groups in which they are displayed.
+ * For each option, the following information is stored:
+ * - name: the internal (variable) name
+ * - caption: the description of the option in the UI
+ * - type: one of SMOPT_TYPE_*
+ * - refresh: one of SMOPT_REFRESH_*
+ * - size: one of SMOPT_SIZE_*
+ * - save: the name of a function to call when saving this option
+ * @return array all option information
+ */