Splitting up txs.ts into different stages based on purpose

[hgrov52]

Make sure all the right functions have been moved and that the code is properly refactored intuitively.

[colatkinson]

Currently does not pass Travis, and there are some syntax errors in txs.ts at a minimum. Also, can you guys merge in the latest master?

[codecov]

Codecov Report

Merging #65 into master will not change coverage.
The diff coverage is 98.52%.

@@           Coverage Diff           @@
##           master      #65   +/-   ##
=======================================
  Coverage   98.85%   98.85%           
=======================================
  Files           6       10    +4     
  Lines         438      438           
  Branches       69       69           
=======================================
  Hits          433      433           
  Misses          5        5

Impacted Files	Coverage Δ
lib/txs.ts	93.02% <ø> (-4.19%)	⬇️
lib/verify.ts	100% <ø> (ø)	⬆️
lib/tx-lock.ts	100% <100%> (ø)
lib/tx-commit.ts	100% <100%> (ø)
lib/tx-generate.ts	100% <100%> (ø)
lib/tx-unlock.ts	94.11% <94.11%> (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 88a4caf...ab746ae. Read the comment docs.