Some improvements to the README.

[szmyd]

Apparently this increases code coverage by 2.38% !!!! ;)

[codecov-commenter]

Codecov Report

Patch coverage: 51.08% and project coverage change: +2.38% 🎉

Comparison is base (b6c6a89) 47.56% compared to head (b3ae4f1) 49.95%.
Report is 5 commits behind head on master.

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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #175      +/-   ##
==========================================
+ Coverage   47.56%   49.95%   +2.38%     
==========================================
  Files          86       86              
  Lines        7114     7313     +199     
  Branches      916      959      +43     
==========================================
+ Hits         3384     3653     +269     
+ Misses       3403     3270     -133     
- Partials      327      390      +63     

Files Changed	Coverage Δ
...clude/homestore/btree/detail/btree_mutate_impl.ipp	55.38% <ø> (+2.29%)	⬆️
src/include/homestore/homestore_decl.hpp	54.16% <0.00%> (-7.74%)	⬇️
src/include/homestore/logstore_service.hpp	33.33% <ø> (ø)
src/include/homestore/meta_service.hpp	100.00% <ø> (ø)
src/lib/blkalloc/append_blk_allocator.h	100.00% <ø> (ø)
src/lib/blkdata_svc/blk_read_tracker.hpp	100.00% <ø> (ø)
src/lib/device/journal_vdev.hpp	57.14% <ø> (ø)
src/lib/device/physical_dev.hpp	83.78% <ø> (ø)
src/lib/device/vchunk.cpp	0.00% <0.00%> (ø)
src/lib/device/virtual_dev.hpp	88.23% <ø> (ø)
... and 26 more

... and 10 files with indirect coverage changes

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[hkadayam]

awesome :-)

[szmyd]

awesome :-)

I don't think I have the descriptions/analogies quite right. Better ideas?