README cleanup

* Corrected misspelling
* Updated some URLs
* Added line breaks to paragraphs
Don't try to look at the current database state of an object if it hasn't been created yet.
Merge pull request #1 from Dwayne-Bent-ZocDoc/readme_cleanup

README cleanup
Fix null reference exception that was encountered when the sql script failed to parse.
Execute scripts in a transaction so that failures can be rolled back.
Merge branch 'master' of https://github.com/ZocDoc/ZocBuild.Database
Merge branch 'master' into NET_40