1571 calendar improvements No. 3

This is a MR for item No 3 in issue #1571. It adds a "Mass Select/Deselect" function in both Shared and My Calendar Views. The background colour of the mass select widget is hardcoded to match the dark grey used for the left menu and calendar heading.

This MR comprises two commits. One to modify the templates and language file, and the other to add the Javascript event handler.

See merge request !800

HTML injection fix for compose email popup



See merge request !801

Fixes clickable link in marketing section

See merge request !792

log4php version upgraded version 2.3.0

log4php upgraded to latest version 2.3.0 [Ref](http://logging.apache.org/log4php/changelog.html)

See merge request !789

log4php version upgraded version 2.2.1

See merge request !788

log4php version upgraded version 2.2.0

[Reference](http://logging.apache.org/log4php/changelog.html) to library resource.

See merge request !787

log4php library upgraded version 2.1.0

See merge request !786

Fixes #1480 #1315 log4php library upgraded to version 2.0

This is the resource [ref](https://github.com/apache/logging-log4php) for upgrade.

See merge request !785

Webservice extendSession throwing Authentication failed error

See merge request !784

Jquery update

See merge request !783

Jquery update

See merge request !782

Fixes #1521 Description field width has been addressed

See merge request !781

Jquery library upgrade

See merge request !780

Patch to fix #1557

Encapsulates arrap_map function name in quotes. Refs #1557

See merge request !779

Fixes #1546 CRMEntity buildSearchQueryForFieldTypes() api cleanup

See merge request !778

ModTracker package is updated

See merge request !777

Password validation regex centralized

See merge request !776