added new schema model class
added new table model class
added new {Item,Log}Table model classes
Merge branch 'master' of github.com:treasure-data/td-import-java into refactoring
refactoring v4
created new FixedColumnsPrepareConfiguration class and changed CSV file reader classes -- changed class hierarchy of Configuration
changed CSVRecordReader class -- fixed bug: prepare processor stops if it cannot parse invalid records during pre-execution (sampling) time.
changed CHANGES.txt