added py_ui/ directory : draft for the UI
improved downloaddemo icons; added hidetoolbars, minus and plus icons
modified reading mode's icons : 128x64 -> 64x64
new UI with buttons in text zone
new UI with buttons in text zone : added qt/sourcetoolbar.*, qt/sourcezone.*
added new icon files : reading_[a|l|r]mode_[on|off].*
the commentary zone has now its toolbar
+/- buttons are now connected to the proper functions
maintoolbar.hidetoolbars button is ok
unique_toolbar > mainwintoolbar
hidetoolbars button has now two states : on/off
fixed a typo : 'adress' > 'address'
connect() -> QObject::connect() everywhere
improved messages in ~UI()
removed useless MainWindow::documentWasModified()
new compilation option : NO_STATUS_BAR
ordered compilation options in dipylonreader.pro
modifided project's name for the user 'DipylonReader' > 'DipylonR'; improved message in DownloadDemoDipyDocs constructor
Merge branch 'feature56' into dev
new UI : both editors have a toolbar