ENH: drop tracelog from main menu; moved to tools
RF: remove testing action
FIX: correct name of developer's guide
ENH: waf script generates the developersguide
DOC: an introduction to users extensions; devsguide
FIX: no view defined in a type
FIX: reopen tab view with source data
ENH: support store of sources
ENH: support for sources store, load, and free data
ENH: added modul with operation for csv file
ENH: loader supports filtering over all types
ENH: support arguments and key-words with callbacks in events
ENH: info about filtered sources; correct selecting parameters
FIX: detach sources
ENH: base version of settings widget
FIX: set active item in SimpleComboBox; empty list
ENH: support for combobox items
ENH: support for radio & check buttons items
ENH: setting dialog with status bar
RF: finalize code and added doc-strings