Add a new set of parameters to allow modules to be customly minimized.
It works like this: If a module has the parameter "minimize" set to a
true value, it will *not* use the built-in minimizer, and instead look
for "minimized" parameters (e.g. if date has the "format" parameter, it
would look for "minimized.format" when in minimized state). This allows
the user to have different parametrization for different states.
Also, using the "start-minimized" parameter allows for modules to start
minimized.
Note: This is hinging off the *module*, not the *widget* (the current,
hard-coded hiding is per-widget). This means that modules using this
method will only show a single widget - the first one - when in
minimized state. The module author has to account for that.
see #791
if a module fails to load, explicitly log errors for core and contrib in
the error log, but be a bit less verbose (and less confusing) in the
module error message itself.
fixes#747
make it possible to toggle the display state of a widget between
"displayed" and "minimized" also for modules that re-create their
widgets during each iteration.
see #661
by default, allow toggling the minimized state of a widget via the
middle mouse and draw a single unicode char instead of the actual
widget, maintaining all states.
fixes#661
a module can now set `self.background = True` in its `__init__()` method
to make sure its update method is invoked in a separate thread.
also, do a PoC implementation of this for the github module.
TODO: add this to dev doc
see #640
OK - so I have to admit I *hate* the fact that PIP seems to require a
subdirectory named like the library.
But since the PIP package is something really nifty to have (thanks to
@tony again!!!), I updated the codebase to hopefully conform with what
PIP expects. Testruns so far look promising...
