MS default tz translate and google X-WR-TIMEZONE argument

[eigenmannmartin]

• adds tests for all day events for ms and google
• sets timezone on all_day events without rrule
• adds tests for both cases

cleaned up pr from this one: #78

[codecov]

Codecov Report

Merging #79 (d06beb8) into master (fee7f42) will increase coverage by 1.08%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #79      +/-   ##
==========================================
+ Coverage   85.04%   86.12%   +1.08%     
==========================================
  Files           4        4              
  Lines         341      346       +5     
  Branches       81       83       +2     
==========================================
+ Hits          290      298       +8     
+ Misses         27       24       -3     
  Partials       24       24              

Impacted Files	Coverage Δ
icalevents/icalparser.py	86.61% <100.00%> (+1.47%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update fee7f42...d06beb8. Read the comment docs.

[eigenmannmartin]

@irgangla is there anything I can help you with?