updated td-import.jar
added Source and SourceClient classes. They are interface of input data
added LocalFileSource class
added SourceDesc class. It's parser for paths of input data
prototyped S3Source and S3SourceClient classes.
changed test classes -- refactoring
changed bulk import classes with Source and SourceClient classes
deleted S3SourceClient and SourceClient classes
changed pom.xml -- uses aws-java-sdk 1.3.22
minor change of TestBulkImportCommand class
changed S3Source and SourceDesc classes -- implemented S3 access within the classes
updated td-import.jar