Styling and content added to intro page and extract

[Jen-Harris]

not ideal styling but will do for now :)

[codecov[bot]]

Codecov Report

Merging #91 into master will decrease coverage by 0.52%. The diff coverage is n/a.

@@            Coverage Diff             @@
##           master      #91      +/-   ##
==========================================
- Coverage   94.64%   94.11%   -0.53%     
==========================================
  Files          16       15       -1     
  Lines         112      102      -10     
  Branches        4        4              
==========================================
- Hits          106       96      -10     
  Misses          6        6

Impacted Files	Coverage Δ
src/controllers/intro.js	94.44% <0%> (-1.02%)	:arrow_down:
src/controllers/multichoice.js	100% <0%> (ø)	:arrow_up:
src/views/helpers/add-one.js

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[codecov[bot]]

Codecov Report

Merging #91 into master will increase coverage by 0.22%. The diff coverage is n/a.

@@            Coverage Diff             @@
##           master      #91      +/-   ##
==========================================
+ Coverage   94.64%   94.87%   +0.22%     
==========================================
  Files          16       16              
  Lines         112      117       +5     
  Branches        4        4              
==========================================
+ Hits          106      111       +5     
  Misses          6        6

Impacted Files	Coverage Δ
src/controllers/multichoice.js	100% <0%> (ø)	:arrow_up:
src/controllers/intro.js	96.15% <0%> (+0.69%)	:arrow_up:

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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 388bc6f...2cce520. Read the comment docs.