add "Getting Help" section and remove star chart

[johnnychen94]

No description provided.

[codecov]

Codecov Report

Merging #949 (448e35f) into master (810480a) will increase coverage by 0.07%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #949      +/-   ##
==========================================
+ Coverage   86.21%   86.28%   +0.07%     
==========================================
  Files           9        9              
  Lines        1023     1021       -2     
==========================================
- Hits          882      881       -1     
+ Misses        141      140       -1     

Impacted Files	Coverage Δ
src/Images.jl	0.00% <0.00%> (-25.00%)	⬇️
src/corner.jl	87.69% <0.00%> (+0.66%)	⬆️

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