Allow disjoing components

[abbiemery]

fixes #72

[codecov]

Codecov Report

Merging #73 (dc84519) into master (e2e6c8f) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master      #73   +/-   ##
=======================================
  Coverage   98.55%   98.56%           
=======================================
  Files          65       65           
  Lines        2082     2084    +2     
=======================================
+ Hits         2052     2054    +2     
  Misses         30       30           

Impacted Files	Coverage Δ
tickit/core/management/event_router.py	100.00% <100.00%> (ø)

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[callumforrester]

Looks good, it might be an idea to add a yaml file to examples with a few disjointed components.

[callumforrester]

Should wait until #71 is reviewed and merged so we can see the CI passing

[abbiemery]

Looks good, it might be an idea to add a yaml file to examples with a few disjointed components.

Done with the latest commit.