Refs #409, does not allow duplicate emails when editing users.
Refs #409, only emails that do not belong to the user are checked for duplicates when editing a user.
Refs #410, if user notification is selected while editing a user profile, the email is now sent.

In settings.inc.php, there is now a new variable for the email body text when sending a user a notification that their profile has been updated (separate from the new user notification text). The rich text editor is disabled for the email body text when editing a user as it is when adding one, since CKEditor is html-based and doesn't respect whitespace. This way the formatting from the text in settings.inc.php is preserved without adding html formatting.
Ref #415, Upgrades the version of CKEditor to 4.3.4. Changes default skin to bootstrap.
Refs #416: Grade is shown to learners in "My Assignments".
Refs #330: Fixes php error when a user attempts to review portfolios when portfolios have not been define, and provides notification to the user.
Refs #379: Removes curriculum explorer badge coloration. Coloring based on the percentage of the total it was just confusing to the user.
Refs #375: Adds question_active to queries that pull quiz questions.
Evaluations changes to allow the evaluation of 'patient encounters', as well as the tagging of evaluation responses with a 'descriptor' for reporting purposes, and the addition of a new (somewhat in progress) report which allows viewing aggregates of the results based on the Objectives tagged to the questions, and the descriptors tagged to the responses.
Added in the ability to include a "calculated" total grade on the gradebook export, to facilitate the export of letter grades. Additionally, changed the GRADEBOOK_DISPLAY_WEIGHTED_TOTAL constant to only apply to the profile gradebook pages, and in the process of changing how the `settings` table works to allow organisation specific settings, as well as general settings without an organisation which can be overrided by those organisation specific settings, added the 'export_weighted_grade' setting, and the 'export_calculated_grade' settings to determine whether those should be output on the gradebook, and in the case of the calculated grade- what settings should be used.
Refs #380: Updates _checkCommunity to non-static abstract method, updated child calls to public non-static methods.
Refs #336: Position absolute was set on .modal class in common.css, which was used by previous modal implementations.
Refs #373: Adds ability to browse course specific objectives sets to the curriculum explorer. The user must first select the course one of the objective sets is attached to before the option becomes available from the objective set drop down.
Removed unused FetchAll method from the Entrada_Settings class, and added documentation for the FetchRow method and how it forms queries based on the parameters provided.
Merge branch 'develop' into feature-course-custom-list