Add git files and vim modeline to demo resources

[ThomDietrich]

Regarding the demo package: The following additions make tracking of a users configuration in a git/GitHub repository easier.

.gitattributes

• this file will tell GitHub which files have to be counted as which language in statistics: https://github.com/github/linguist#using-gitattributes

.gitignore

• providing a default gitignore with commented examples

vim modeline

• in accordance with https://github.com/github/linguist#using-emacs-or-vim-modelines
• By adding // vim: syntax=Xtend at the end of each file, GitHub is able to syntax highlight openHAB files.
• Compare before and after
• The extension // vim: syntax=Xtend syntax=openhab will additionally make this compatible with https://github.com/cyberkov/openhab-vim

[kaikreuzer]

The extension // vim: syntax=Xtend syntax=openhab will additionally make this compatible with https://github.com/cyberkov/openhab-vim

Shall we move these files directly somewhere to the distro and add this option in the documentation?

[ThomDietrich]

Thanks for merging! can you rephrase your question?

[kaikreuzer]

What I meant is that https://github.com/cyberkov/openhab-vim mainly contains two simple files, which people can copy to their .vim folder. I wondered if we should put these files in the openhab-distro repo (and potentially even package them in the distro zip as well (although I do not have a good suggestion for the folder where to put them).

[ThomDietrich]

It's arguable if patching vim is a task of the openHAB setup. There is the exact same file ready for nano, would we have to add this one too? I have btw. the open issue cyberkov/openhab-vim#2 asking the developer to add "Xtend" as a syntax, which brings us to the next question: Should vim be patched for openHAB or for Xtend in the long run?

Both vim and nano syntax highlightings are by the way now also part of openHABian.

If you want to continue this discussion, let's create an issue for it.

[kaikreuzer]

Ok, created cyberkov/openhab-vim#3 for further discussion.

[ThomDietrich]

The vim modeline part of this PR is now broken.
GitHub must have changed something in it's highlighting engine. // vim: syntax=Xtend syntax=openhab is not valid anymore, // vim: syntax=Xtend is working but is in conflict with "openhab-vim". Discussed here: cyberkov/openhab-vim#2