MDL-43019 SCORM: always use iframe instead of object - backported from 2.6 - fixes issue with IE 11 SCORM packages not loading
MDL-39575 install: better handling of database creation error.

Implemented better handling of DML exceptions.
Added translation for cannotcreatedb exception.
MDL-43082 Themes IE 9 Compatibility View doesn't support SVG.
MDL-31410 always send 200 in PayPal IPN response and hide all errors
Merge branch 'MDL-39618-24' of git://github.com/danpoltawski/moodle into MOODLE_24_STABLE
MDL-40003 mod_assign: Fixed submission comments not being restored
Merge branch 'MDL-40003-24' of git://github.com/FMCorz/moodle into MOODLE_24_STABLE
Merge branch 'm24_MDL-43019' of git://github.com/danmarsden/moodle into MOODLE_24_STABLE
MDL-43279 block_blog_recent: fixed undefined property notice
Merge branch 'MDL-43131_24' of git://github.com/timhunt/moodle into MOODLE_24_STABLE
Merge branch 'm24_MDL-43082_IE9_Compat_View_SVG_Say_No' of https://github.com/scara/moodle into MOODLE_24_STABLE
MDL-43135 Guest Enrol: new language string for with key icon

AMOS BEGIN
CPY [pluginname,enrol_guest], [guestaccess_withpassword,enrol_guest]
CPY [pluginname,enrol_guest], [guestaccess_withoutpassword,enrol_guest]
AMOS END
Merge branch '24STABLE-wip-MDL-43135' of https://github.com/jennymgray/moodle into MOODLE_24_STABLE
Merge branch 'wip-MDL-43279-m24' of git://github.com/marinaglancy/moodle into MOODLE_24_STABLE
MDL-43218 navigation: Remove link to blogs when they are disabled
MDL-43218 blog: prepare the blog navigation only when needed
Merge branch 'w50_MDL-31410_m24_paypalipn' of https://github.com/skodak/moodle into MOODLE_24_STABLE
MDL-31410 paypal: fix problem on notifications

This commit fixes a PHP warning about using a
unititialised variable and also the problems when
notifications are enabled and there is not yet a
teacher in the course, defaulting to admin for student
notifications and preventing teacher notifications to happen.
Automatically generated installer lang files
Merge branch 'install_24_STABLE' of git://git.moodle.org/moodle-install into MOODLE_24_STABLE