feat: Add Blob.uploadFrom(Path)

[dmitry-fa]

Fixes #62

[codecov]

Codecov Report

Merging #109 into master will increase coverage by 0.08%.
The diff coverage is 88.23%.

@@             Coverage Diff              @@
##             master     #109      +/-   ##
============================================
+ Coverage      63.3%   63.39%   +0.08%     
- Complexity      528      533       +5     
============================================
  Files            30       30              
  Lines          4720     4737      +17     
  Branches        450      452       +2     
============================================
+ Hits           2988     3003      +15     
- Misses         1571     1573       +2     
  Partials        161      161

Impacted Files	Coverage Δ	Complexity Δ
...e/src/main/java/com/google/cloud/storage/Blob.java	82.88% <88.23%> (+0.53%)	35 <5> (+5)	⬆️

---

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 53abe4a...cc83f18. Read the comment docs.