Event Handler plugin support

[codecov[bot]]

Codecov Report

Merging #72 (3e3c3c0) into development (96438c2) will increase coverage by 1.27%. The diff coverage is 93.18%.

@@               Coverage Diff               @@
##           development      #72      +/-   ##
===============================================
+ Coverage        73.53%   74.80%   +1.27%     
===============================================
  Files                9       11       +2     
  Lines              578      623      +45     
===============================================
+ Hits               425      466      +41     
- Misses             153      157       +4     

Impacted Files	Coverage Δ
src/branchrule.rs	55.56% <ø> (ø)
src/lib.rs	0.00% <ø> (ø)
src/node.rs	100.00% <ø> (ø)
src/pricer.rs	75.00% <ø> (ø)
src/eventhdlr.rs	60.00% <60.00%> (ø)
src/model.rs	84.96% <97.44%> (+1.12%)	:arrow_up: