Add mouesover for the execution time
Use tooltip for the dataexplorer execution time
Change warning content
Switch to a full opacity and lighter background instead of using opacity
Align the text of a tooltip on the left
Escape logs -- Related to #2018
Fix online/offline -- Related to 1994
Fix to compute_changes (touches could sometimes override data changes)
Merge branch 'michel_1944_typo' into next
Merge branch 'michel_2018_escape' into next
Merge remote-tracking branch 'origin/michel_1940_execution_time' into next
Merge branch 'next' of github.com:rethinkdb/rethinkdb into next
Use the same compiler to build the dependencies

Closes issue #2057
Review 1291 by @Tryneus
Change call to map::erase to work on GCC 4.4

Closes #2064
Review 1293 by @mlucy
Merge branch 'next' of github.com:rethinkdb/rethinkdb into next
Merge branch 'next' into sam_page_ptr