Messaging data model changes and bug fixes.

Messaging data model changes and bug fixes (controllers).

Refactoring and fixes.

Refactoring of S3ChannelModel - enable/disable/schedule controllers. Bug-fixing.

Fixes.

Fix to allow same username with multiple servers.

Final Fixes to Messaging Channel data model.

Pep-8 styling, fixes.

Comments.

More pep8.
Merge pull request #521 from ashwyn/master

Messaging data model changes and bug fixes.
Simplify limitby-logic in fast_select, optimize count(), fixes
S3Report2: expose chart/table rendering options for URL/defaults.
XML Exports: don't expose foreign keys if not permitted to access the referenced record.
Merge branch 'master' of git://github.com/flavour/eden
XSL tweak,Minify
Merge branch 'master' of git://github.com/flavour/eden
Merge branch 'master' of git://github.com/flavour/ifrc
Merge branch 'master' of git://github.com/flavour/ifrc_qa