Fix trace and step mode on startup.

[craigthomas]

This PR fixes step and trace modes on emulator startup. Previously, if the emulator was started in step or trace modes, it would not execute any code at all. This is because internal state variables were not marked volatile and were therefore not accessible outside of the main emulator thread. Also, checkbox controls were synced to the trace and step flags issued on startup, where previously they were not.

Version number bumped for fix.

[codecov]

Codecov Report

Merging #12 into master will decrease coverage by 10.85%.
The diff coverage is 8.33%.

@@              Coverage Diff              @@
##             master      #12       +/-   ##
=============================================
- Coverage     84.44%   73.58%   -10.86%     
+ Complexity      210      200       -10     
=============================================
  Files            15       15               
  Lines           842      848        +6     
  Branches         55       55               
=============================================
- Hits            711      624       -87     
- Misses          121      217       +96     
+ Partials         10        7        -3

Impacted Files	Coverage Δ	Complexity Δ
...m/chip8java/emulator/components/EmulatorState.java	0% <0%> (-100%)	0 <0> (-1)
...va/com/chip8java/emulator/components/Emulator.java	0.56% <0%> (-49.44%)	1 <0> (-9)
.../emulator/listeners/OpenROMFileActionListener.java	81.48% <50%> (-2.52%)	4 <0> (ø)

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