weekcal: don't handle button-press for ToolbarColumn
some cleaning and code moving: floatingMsg and core.init() and ui.init()
add .gitignore file
version 2.1.2
timeline: zoom int/out using keyboard (and unifying with cleaning in scroll code
Merge branch 'master' into next
bug fix in multi_spin_button.py
cleaning around plugins
cleaning in binary_time_line.py
binary_time_line: add(..., debug=True)
fix in bin_heap to prevent possible problems
add WeeklyEvent, and some cleaning
switch back from EST to BTL
BTL: add getDepth() function
clean extra output
fix critical bug in event_search_tree
minor fix in bin_heap
switch to EventSearchTree again
cleaning in event_search_tree
fix in Persian translation