Check whether line endings are LF with Travis CI

[junichi11]

• Change line endings of a few files to LF.
• Add a script for Travis CI to check line endings.

[geertjanw]

+1 looks good to me. Would be good if someone else reviewed this too.

[junichi11]

@geertjanw Thanks a lot for your review!

Jan is working on #269. So I'll fix .travis.yml again after Jan's changes are merged.

[lbruun]

Great stuff.

I'm far from a git expert but as far as I understand there also the solution of using a .gitattributes file. Because this file lives in the repo itself, users will automatically get the correct git setting when they clone the repo. See Vaadin project on GitHub for an example of such a file.

I'm thinking that we should probably do both this PR as well as as .gitattributes file, but someone with git experience will probably know if the .gitattributes solution is worthwhile.

[junichi11]

Changed /** to /*

[lbruun]

@junichi11
I think we should monitor if this works or not. As far as I can tell the check relies on Git's ability to predict if a certain file is to be considered a text file or not. There may be some text files where we actually find it ok for them to use CRLF. Files of type .rc comes to mind. These are Windows resource scripts and have no relevance outside of Windows. Just an example.

I've now proposed PR290. These two PRs will complement each other.