show syntax error location when running into jinja2.exceptions.TemplateS...

[bitmensch]

...yntaxError

This fixes #50.

[coveralls]

Coverage decreased (-0.85%) when pulling 5375172 on benjixx:verbose-template-syntax-error into cf1fb09 on audreyr:master.

[coveralls]

Coverage decreased (-2.66%) when pulling 3111b67 on benjixx:verbose-template-syntax-error into cf1fb09 on audreyr:master.

[thedrow]

Note that this pull request closes #50.
Why does the coverage decrease?

[audreyfeldroy]

I think the "decrease" is a bug in @coveralls, but I'm not sure. Anyone know?

[thedrow]

@audreyr When you run it locally does the coverage decrease?

[bitmensch]

The strange thing is that I received a mail from coveralls where it says:

Coverage remained the same

[audreyfeldroy]

Merged this into master, it's great! Will do a PyPI release very soon. Thank you!

Honestly I haven't yet figured out how to generate local combined coverage.py reports that show 2.6+2.7+3.3 coverage, so I don't actually know the total coverage other than what Coveralls reports. But I will work on this when I get a chance.