[IMP] work in progress on stats buttons. The goal is to allow buttons with dynamic/statistical informations in form views (addon web)
[IMP] css tweaks to stat buttons
[IMP] adds PercentPie and X2Many widgets to formview.  PercentPie takes a field 'float' and displays a read-only pie chart to visualize the corresponding percent. X2Many takes a 1tomany or a manytomany field and display a read only string '<number of records> <label>'
[IMP] css tweaks to stat buttons
[IMP] chooses better color for the percentpie widget in form view
[IMP] removes the 'stat_button' widget and modifies button to fulfill that role.  Now, a button with a class 'oe_stat_button' will be displayed differently (look in form views) (addon web).  Also removes the useless widget x2many
[IMP] removes the tooltip when mouse hovers over a 'percentpie' widget (addon web)
[IMP] various tweaks to stat_button, to fix issues mentioned in code review.  This is mostly cosmetic cleanups, only notable change is that stat_button is now a proper html button instead of a label (addon web)
[FIX] correctly handle the case where a 'stat button' has a string attribute (it needs to be displayed in a div instead of a span) (addon web)
[IMP] improves the look of the stat buttons in form view: the statinfo widget displays the information on two lines, the padding/margin/width have been adjusted. (addon web)
[MERGE] merge from trunk into local branch
[IMP] removes the shadow in stat buttons, to give them the 'flat' look (addon web)
[MERGE] merge from trunk
[FIX] fixes an alignment issue in the template definitions (addon web)
[FIX] ged's fp-style merge