Thanks to Nadav Kavalerchik for the suggestion on patch

Fix various incorrect urls
Fix incorrect phpdocs and other minor code style issues
Fix missing/incorrect strings

AMOS BEGIN
 MOV [eventblogassociationcreated, core_blog],[eventblogassociationadded, core_blog]
AMOS END

Changes done for following events:
- \core_auth\event\user_loggedin
- \core\event\role_assigned
- \core\event\role_unassigned

* fix typos (thanks Rajesh)
* move log related data out from event API specification
* change callable key in definition to callback
* use event data in observers instead of cached records if possible
* event level is now a number 1…100
* improved event safety checks
* add event name and description method
* new can_view() method
* improve unit tests to test all callable types
* improved performance

MDL-31429 enrol: added db/messages.php for enrolment plugins and added some smarts to messaging so it won't display message settings for disabled enrolment plugins

Changes include:

    - fixing versions and requires to current weekly (2011060313)
    - fix essay wrong upgrade step. Review & test!
    - fix numerical missing savepoint.

MDL-21782 reworked enrolment framework, the core infrastructure is in place, the basic plugins are all implemented; see the tracker issue for list of unfinished bits, expect more changes and improvements during the next week

AMOS START
    MOV [sendcoursewelcomemessage,core_admin],[sendcoursewelcomemessage,enrol_self]
    MOV [configsendcoursewelcomemessage,core_admin],[sendcoursewelcomemessage_desc,enrol_self]
    MOV [enrolstartdate,core],[enrolstartdate,enrol_self]
    MOV [enrolenddate,core],[enrolenddate,enrol_self]
    CPY [welcometocourse,core],[welcometocourse,enrol_self]
    CPY [welcometocoursetext,core],[welcometocoursetext,enrol_self]
    MOV [notenrollable,core],[notenrollable,core_enrol]
    MOV [enrolenddaterror,core],[enrolenddaterror,enrol_self]
    MOV [enrolmentkeyhint,core],[passwordinvalidhint,enrol_self]
    MOV [coursemanager,core_admin],[coursecontact,core_admin]
    MOV [configcoursemanager,core_admin],[coursecontact_desc,core_admin]
    MOV [enrolledincourserole,core],[enrolledincourserole,enrol_manual]
    MOV [enrolme,core],[enrolme,core_enrol]
    MOV [unenrol,core],[unenrol,core_enrol]
    MOV [unenrolme,core],[unenrolme,core_enrol]
    MOV [enrolmentnew,core],[enrolmentnew,core_enrol]
    MOV [enrolmentnewuser,core],[enrolmentnewuser,core_enrol]
    MOV [enrolments,core],[enrolments,core_enrol]
    MOV [enrolperiod,core],[enrolperiod,core_enrol]
    MOV [unenrolroleusers,core],[unenrolroleusers,core_enrol]
AMOS END

MDL-21655 big scary enrolment and roles improvements - see tacker for list of changes, includes other minor fixes too

MDL-21233 moodle_url improvemewnts, code simplification, more diagnostics; fixed several regressions

MDL-20700 coding style cleanup - cvs keywords removed, closign php tag removed, trailing whitespace cleanup