* Redefine obsolete 'newsession' and 'newfile' commands
* Add explicit settings <-> object update functions
* Efficient SPEC file re-use, checking hw_config and updating EPOCH

From list of bliss sessions:
- creates spec config file
- creates spec setup file
- registers tango servers

Resolve "No write_readlines() in serial.py  Needed for SCPI."

Closes #153

See merge request !486

added doc for toolbar customization + new widgets

See merge request !561

to display labels and result of a user function

Resolve "Handle multiple P201 cards"

Closes #161

See merge request !547

Session `get_current` fix

See merge request !560

Added test for current session

xyonrotation: first version.

See merge request !559

This calculation controller is use to create virtual axis
which compensate the rotation angle.

fix #204: spec/bliss/motion.mac: updated version (from bibhelm)

Closes #204

See merge request !552

fix #203

Closes #203

See merge request !553

`load_script` function refactoring, default-plugin objects, and more tests

Closes #205

See merge request !554

Refactoring, better solution to mulitple load_script functions problem spotted by tests

Docdoc

Closes #206

See merge request !556

common/session: make sure sessions do not include by default objects with plugin 'default' (config dicts)

common/session.py: refactoring, better solution to mulitple load_script functions problem spotted by tests

session: added get_source to be able to prdef beacon scripts

Closes #178

See merge request !558