Add badges of CircleCI and codecov

[my8100]

No description provided.

[pep8speaks]

Hello @my8100! Thanks for opening this PR. We checked the lines you've touched for PEP 8 issues, and found:

• In the file scrapydweb/default_settings.py:

Line 14:1: E266 too many leading '#' for block comment
Line 18:1: E266 too many leading '#' for block comment

[codecov]

Codecov Report

Merging #62 into master will increase coverage by 0.19%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master      #62      +/-   ##
==========================================
+ Coverage   89.46%   89.66%   +0.19%     
==========================================
  Files          30       30              
  Lines        3541     3541              
==========================================
+ Hits         3168     3175       +7     
+ Misses        373      366       -7

Impacted Files	Coverage Δ
scrapydweb/default_settings.py	100% <ø> (ø)	⬆️
scrapydweb/__version__.py	100% <100%> (ø)	⬆️
scrapydweb/views/files/log.py	95.35% <0%> (+2.16%)	⬆️