Remove uncommon exceptions and add NoSuchMethodError. Print explain message in Tool.
Add missing-source and missing-sink Errors in XHandler. Print stack trace before additional message.
Correct one typo. And import cascading.flow.planner.PlannerException
In Tool, call t.getClass to get its actual class.
Provide String argument for InvalidSourceException's Constructor.
Format and writing corrections.
Merge pull request #402 from reconditesea/klin_i389

Klin i389