Add new pages for aggregating stats: Node Reports and Cluster Reports

[my8100]

No description provided.

[pep8speaks]

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

• In the file scrapydweb/views/files/log.py:

Line 145:13: W503 line break before binary operator
Line 146:13: W503 line break before binary operator
Line 147:13: W503 line break before binary operator
Line 147:13: E129 visually indented line with same indent as next logical line
Line 270:13: W503 line break before binary operator
Line 270:13: E129 visually indented line with same indent as next logical line
Line 373:16: W503 line break before binary operator

Comment last updated at 2019-07-30 09:06:47 UTC

[coveralls]

Pull Request Test Coverage Report for Build 129

• 150 of 164 (91.46%) changed or added relevant lines in 8 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.4%) to 89.1%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
scrapydweb/views/baseview.py	5	6	83.33%
scrapydweb/views/dashboard/cluster_reports.py	25	26	96.15%
scrapydweb/views/files/items.py	0	1	0.0%
scrapydweb/views/dashboard/node_reports.py	28	31	90.32%
scrapydweb/views/files/log.py	78	86	90.7%

Totals
Change from base Build 117:	0.4%
Covered Lines:	3278
Relevant Lines:	3679

---

💛 - Coveralls

[codecov]

Codecov Report

Merging #75 into master will increase coverage by 0.29%.
The diff coverage is 91.46%.

@@            Coverage Diff             @@
##           master      #75      +/-   ##
==========================================
+ Coverage   88.85%   89.15%   +0.29%     
==========================================
  Files          30       32       +2     
  Lines        3554     3679     +125     
==========================================
+ Hits         3158     3280     +122     
- Misses        396      399       +3

Impacted Files	Coverage Δ
scrapydweb/views/operations/schedule.py	98.23% <ø> (ø)	⬆️
scrapydweb/views/overview/servers.py	93.75% <ø> (ø)	⬆️
scrapydweb/views/files/items.py	51.28% <0%> (-1.35%)	⬇️
scrapydweb/views/files/logs.py	100% <100%> (ø)	⬆️
scrapydweb/__init__.py	95.9% <100%> (+0.17%)	⬆️
scrapydweb/views/dashboard/jobs.py	92.35% <100%> (ø)
scrapydweb/views/baseview.py	88.54% <83.33%> (-0.13%)	⬇️
scrapydweb/views/dashboard/node_reports.py	90.32% <90.32%> (ø)
scrapydweb/views/files/log.py	94.9% <90.69%> (+1.71%)	⬆️
scrapydweb/views/dashboard/cluster_reports.py	96.15% <96.15%> (ø)
... and 3 more