Merge Table and TableFull style
Merge MemoryImage with Image, but left addMemoryImage for backward compatibility
More unit tests
Merge branch 'develop' into #160-refactoring
Delete MemoryImageTest.php and TableFullTest.php
Update documentation
Change exception type
Merge remote-tracking branch 'upstream/develop' into #160-refactoring
Merge pull request #169 from ivanlanin/#160-refactoring

#160 refactoring: Merge TableFull-Table Style + Merge MemoryImage-Image
Update README.md, docs, and version number