cubicweb-bootstrap #5649602 update bootstrap to latest 3.3 release [validation pending]

3.3.5 as of this writing

prioritynormal
typetask
done in1.1.0
load0.500
load left0.000
closed by#93ab4d93e027 [data] Use custom bootstrap 3.3.5 theme (closes #5649602)
patch[data] Use custom bootstrap 3.3.4 theme (closes #XXX) [applied]