doc: included readme-file
doc: included readme-file

(copy pasted most from google project side)

git-svn-id: 724e95a784f60460ab2da41b41fe555f4995b19a@8 16edceb8-e338-11de-9129-6395494df245

SQLDroid/SQLDroid,SQLDroid/SQLDroid,47deg/mvessel,dperiwal/SQLDroid,47deg/scala-sqlite-droid,dperiwal/SQLDroid