update documentation with the formula revision

git-svn-id: svn+ssh://controls01/siciliarep/svn/trunk/tango_client/ctrflyrtech_fdl/trunk@13126 a18efa20-c439-0410-bf20-9b91ec695b4c
add a qspinbox in the main window with the beam current (not only in the file load) to allow recalculations based on it.
temporal intermediate calculations for BeamPhase because many issues found with the arcsin calculation.

git-svn-id: svn+ssh://controls01/siciliarep/svn/trunk/tango_client/ctrflyrtech_fdl/trunk@13127 a18efa20-c439-0410-bf20-9b91ec695b4c
update Signal diagram

git-svn-id: svn+ssh://controls01/siciliarep/svn/trunk/tango_client/ctrflyrtech_fdl/trunk@13128 a18efa20-c439-0410-bf20-9b91ec695b4c