[doc] Some updates

doc/FEATURES.md

@@ -0,0 +1,5 @@
+# Collection of features that need documentation
+
+- theme.minwidth
+- scrolling decorator
+- theme.exclude

doc/NOTES.md

@@ -7,7 +7,7 @@
 
 # small stuff
 - rethink documentation (wiki vs. in-code)
-- @parameter? (or was it @attribute?)
+- @parameter? (or was it @attribute?) - remove getter/setters
 - use __ for private?
 
 # Features
@@ -21,8 +21,9 @@
 - tkinter / popups
 - scrolling decorator (incl. minwidth, alignment)
 - theme.exclude??
+- bumblebee-ctrl
 
 ## Improvements
+- generalize the battery/hbar/vbar concept
 - pango output (improve - maybe autodetect? see #531)
 - allow handlers to specify whether to update or not (e.g. scroll)
-- error handling: don't catch too many exceptions in a module (pulseaudio!), instead, propagate them as error widgets