removed hardwired version number from phing installation step.

refs #250
Oh, hey, we load Modernizr and then...DON'T USE IT AT ALL.
rm Modernizr-specific and unused no-js/js class
rm Modernizr and associated classes
Merge pull request #258 from Trott/rm-dead-code

Oh, hey, we load Modernizr and then...DON'T USE IT AT ALL.
Merge branch 'master' into reinstate-modernizr
revert PR #258 which got rid of Modernizr. One thing Modernizr does is make HTML5 section elements (<nav>, <section>, et al.) behave as expected in IE. Removing Modernizr changed the rendering in IE8. Needs more review/discussion.
Merge pull request #259 from Trott/reinstate-modernizr

Reinstate modernizr
replace Modernizr with html5shiv
Merge pull request #261 from Trott/re-remove-modernizr

replace Modernizr with html5shiv
fixed typo in code comment.
rm all ie-lt* classes, issue #262
added missing dependency. fixes #260
Merge pull request #264 from Trott/rm-ie-specific-classes

rm all ie-lt* classes, issue #262
Merge pull request #263 from stopfstedt/bug260

fixes broken mesh picker dialog in reports UI.
replaced group_default_instructor table with two separate join tables.
add migration for breaking up the group_default_instructor table.
bumped migration number.
bumped migration counter.
rewrote ALL the queries that were pulling data from group_default_instructor to use group_x_instructor/group_x_instructor_group as applicable.