add documentation configuration files

Enyo-DCO-1.1-Signed-Off-By: Cole Davis (cole.davis@lge.com)
Update version string to 2.5.1-pre.1
Merge remote-tracking branch 'origin/ENYO-17' into ENYO-17

Conflicts:
	docs/conf.json
Merge branch 'master' into ENYO-17

Conflicts:
	version.js