* Basic GIT integration: added .gitattributes, .gitignore, and README.md.
* Edited README.txt with GIT installation instructions.

Signed-off-by: Euphy <euphy@rathena.org>

git-svn-id: https://svn.code.sf.net/p/rathena/svn/trunk@17421 54d463be-8e91-2dee-dedb-b68131a5f0ec
Merge branch 'master' of https://github.com/rathena/rathena

git-svn-id: https://svn.code.sf.net/p/rathena/svn/trunk@17422 54d463be-8e91-2dee-dedb-b68131a5f0ec
Merge branch 'master' of https://github.com/rathena/rathena

git-svn-id: https://svn.code.sf.net/p/rathena/svn/trunk@17423 54d463be-8e91-2dee-dedb-b68131a5f0ec
Merge branch 'master' of https://github.com/rathena/rathena

git-svn-id: https://svn.code.sf.net/p/rathena/svn/trunk@17424 54d463be-8e91-2dee-dedb-b68131a5f0ec
Merge branch 'master' of https://github.com/rathena/rathena

git-svn-id: https://svn.code.sf.net/p/rathena/svn/trunk@17425 54d463be-8e91-2dee-dedb-b68131a5f0ec