Issue#369. Call sourceConfInit in HadoopTest Mode.

Fixes openForRead in HadoopTest to call sourceConfInit before
calling openForRead on the tap.
In README.md add link to FAQ sbt anchor.
In README.md add link to FAQ sbt anchor.
Merge branch 'klin_readme_sbt' of https://github.com/reconditesea/scalding into klin_readme_sbt

Conflicts:
	README.md
Merge pull request #404 from reconditesea/klin_readme_sbt

Klin readme sbt
Merge pull request #403 from renuka-apte/issue369

Issue#369. Call sourceConfInit in HadoopTest Mode.