Activate Travis build and fix scripts to comply with flake8 standards (rebased onto develop)

[sbesson]

This is the same as gh-41 but rebased onto develop.

---

This PR adds a .travis.yml file at the top-level of the repository running flake8 on all the Python scripts. It also fixes individual scripts to comply with flake8 standards and let the Travis build pass.

• omero/analysis_scripts/Kymograph.py
• omero/analysis_scripts/Kymograph_Analysis.py
• omero/analysis_scripts/Plot_Profile.py
• omero/export_scripts/Batch_Image_Export.py
• omero/export_scripts/Make_Movie.py
• omero/figure_scripts/Movie_Figure.py
• omero/figure_scripts/Movie_ROI_Figure.py
• omero/figure_scripts/ROI_Split_Figure.py
• omero/figure_scripts/Split_View_Figure.py
• omero/figure_scripts/Thumbnail_Figure.py
• omero/import_scripts/Populate_ROI.py
• omero/setup_scripts/FLIM_initialise.py
• omero/util_scripts/Channel_Offsets.py
• omero/util_scripts/Combine_Images.py
• omero/util_scripts/Dataset_To_Plate.py
• omero/util_scripts/Images_From_ROIs.py

To test this PR:

• check the changes do not break any script functionality in the deployed server
• check https://travis-ci.org/sbesson/scripts is green

[sbesson]

--rebased-from #41

[snoopycrimecop]

Conflicting PR. Removed from build OMERO-merge-develop#422. See theconsole output for more details.

[sbesson]

Yeay Travis is green :)

[will-moore]

https://travis-ci.org/sbesson/scripts looks Red to me:

$ rake
rake aborted!
No Rakefile found (looking for: rakefile, Rakefile, rakefile.rb, Rakefile.rb)

[sbesson]

https://travis-ci.org/ome/scripts/builds/11820688 is the correct link

[will-moore]

https://travis-ci.org/ome/scripts/builds/11820688 is green ;)
And a quick test of a few scripts finds no problems.
Good to merge.

[joshmoore]

Thanks, @will-moore. With this in, all new PRs should start going green.