Removed qtip. Now using bootstrap tooltips

Use the function "options_for_tooltip" to create tooltips with different settings
and mantain compatibility
Refactored icon_helpers
Refactored all .haml views to use the new tooltips. Added tooltips inside modals again
Merge remote-tracking branch 'origin/feature#394' into branch-v2, refs #394
Bit more cleanup and adjustments for tooltips with bootstrap, refs #394