[MRG+1] Import scurl if found installed

[malloxpb]

Hey @lopuhin, I made this PR to run scurl test on w3lib itself. Let me know if there's something that can be improved here 😄

[malloxpb]

I noticed that there's an error on py33 in travis build. I think it's because tox does not support py33 anymore (https://tox.readthedocs.io/en/latest/install.html) Can you take a look at this for me when you have a chance @kmike ? 😄

[codecov[bot]]

Codecov Report

Merging #110 into master will decrease coverage by 0.07%. The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #110      +/-   ##
==========================================
- Coverage   95.43%   95.35%   -0.08%     
==========================================
  Files           7        7              
  Lines         482      474       -8     
  Branches       98       95       -3     
==========================================
- Hits          460      452       -8     
  Misses         15       15              
  Partials        7        7

Impacted Files	Coverage Δ
w3lib/url.py	97.96% <100%> (-0.08%)	:arrow_down:
w3lib/encoding.py	100% <0%> (ø)	:arrow_up:

[malloxpb]

travis also gives the same error on master branch: https://travis-ci.org/nctl144/w3lib

[malloxpb]

Hey @lopuhin , I just added the echo command in the scurl envs so that we know that it's supposed to be installed and tested in SCURL testing env. :-) Let me know what you think!

[lopuhin]

I just added the echo command in the scurl envs so that we know that it's supposed to be installed and tested in SCURL testing env. :-) Let me know what you think!

@nctl144 sorry that I didn't respond right away, please see https://github.com/scrapy/w3lib/pull/110#discussion_r206421735

[malloxpb]

@lopuhin I just changed the echo command to python -c "from scurl import canonicalize_url" to make sure it's imported successfully 😄

[Gallaecio]

@nctl144 I’m sorry that it has been a year. Do you think you will have time to resolve the current conflicts?

[malloxpb]

Hey @Gallaecio , I will try to take a look into it and I will let you know as soon as I can :) Sorry for the delay in response

[yozachar]

Bumping to close outdated PR.