Marked some paths for github's linguist

Author: foosel

.gitattributes

@@ -1 +1,10 @@
 src/octoprint/_version.py export-subst
+
+src/octoprint/static/js/lib/* linguist-vendored
+src/octoprint/static/less/bootstrap/* linguist-vendored
+src/octoprint/static/less/font-awesome.less linguist-vendored
+src/octoprint/static/less/mixins.less linguist-vendored
+src/octoprint/static/less/variables.less linguist-vendored
+versioneer.py linguist-vendored
+
+docs/* linguist-documentation