Branch populate sample data

[moyj01]

1. Populate sample data from 2 to 10
2. Update UG to have annotated diagram

[sgn00]

LGTM!

[codecov-io]

Codecov Report

Merging #211 into master will decrease coverage by 0.25%.
The diff coverage is 0.00%.

@@             Coverage Diff              @@
##             master     #211      +/-   ##
============================================
- Coverage     64.59%   64.33%   -0.26%     
  Complexity      588      588              
============================================
  Files           108      108              
  Lines          2008     2016       +8     
  Branches        223      223              
============================================
  Hits           1297     1297              
- Misses          630      638       +8     
  Partials         81       81              

Impacted Files	Coverage Δ	Complexity Δ
...ava/seedu/flashcard/model/util/SampleDataUtil.java	15.78% <0.00%> (-11.49%)	1.00 <0.00> (ø)

---

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 aaa1f8a...19806c9. Read the comment docs.