"Text" has "isLike" as a property.
"TextIter" read all "Text" from input files.
"TextIter" reads all "Text" from single text file.
Make all properites of "Text" public.
Add annotations to all properties for JSON representation.
"sieve" command requires a path of text file which contains text data to be extracted or filtered.
Fix: sieve.NewTextIter returns two value.
Fix: Pass a pointer to "(*Decoder).Decode".
Create an instance of "TextIter" for a file specified with command-line arguments.
Merge branch 'feature/instance-iter'