add Export-ignore

[Karel Wintersky]

File .gitattributes

* text=auto
* eol=lf

.git				export-ignore
.gitattributes		export-ignore
.gitignore			export-ignore
ci				export-ignore
.scrunitizer.yml	export-ignore
.sensiolabs.yml	export-ignore
phpspec.yml		export-ignore
phpunit.xml.dist	export-ignore
CONTRIBUTING.md	export-ignore

this removed useless files from composer-installed package