Handle in QueryBuffer
Move hasNonSpace to QueryBuffer
Use, and test, new addLine() and hasNonSpace() functionality
Cleanup, check -- in quotes
merge nathanlws: Handle dash comments in CLI

Merge pull request #38 from nathanlws/sql-layer-client-tools/cli-handle-dash-comments
https://github.com/FoundationDB/sql-layer-client-tools/pull/38