Add rspec to gem devel dependency for test
Add LineReader and its Parsers spec
Add MessagePackParsingReader spec
Add skelton specs for rest classes
Use respond_to? for Ruby 1.8
Add FileReader filters spec
Add FileReader io filter spec
Fix FileReader::DelimiterParser specs
Add FileReader spec
Add json / msgpack with --columns / --column-header spec
Fix time require position
Add apache and syslog parsers to FileReader
Refactor readers spec
Refactor table:import using FileReader

This change breaks the backword compatibility of error message.
Merge branch 'master' into refactor-table-import
Merge master branch
Add SeparatedValueParsingReader to FileReader and its test
Merge branch 'master' into refactor-table-import
Revert 'Refactor table:import using FileReader' commit

We should resolve encoding issue before
replace table:import with FileReader.