DOC: update user manual to introduce modifications involved by the charts engine in 0.7.7
Shared by all charts
* zoom/pan with keyboard CTRL +, CTRL -, LEFT, RIGHT, UP, DOWN
CA
* highlight some points in CA factorial map from the row/column infos
table tabs by clicking on a point in the factorial map scatter plot
* highlight some points in the row/column infos table tabs from the CA
factorial map chart by clicking on a row of the tables
(from redmine: issue id 1130, created on 2014/11/18 by Sebastien Jacquot)