BBFS Release 1.7.1 (fixed)

Same notes as for Release 1.7.1

ChageLog:
bug of absent variable declaration fixed.

BBFS Release 1.7.1

Patch for 1.7.0
See Issue #268

ChangeLog:
1.No Params.init run while Log suppose that Params were initialized.
Solution: fixed in fix_content_data
2.There is no check of an instance line that was read from old-format file.
Solution: check was added
3.We suppose that delimiter in the old format files is a comma, but actually, in this specific case '<' was used as a delimiter.
Solution: additional parameter, that contains fields delimiter was added to fix_content_data executable and appropriate methods of ContentData. Default value was set to comma.
4. Params.init no more demands from user an input.
Motivation: there are a number of executables and tests that use Params.init but have no ARGV array.
5. command line help was added for bin/fix_content_data. To get the help user should run fix_content_data without parameters

User interface changes:
bin/fix_content_data usage changed:
fix_content_data [delimiter, default is ',']
bin/fix_content_data old.cd fixed.cd
is equivalent to
bin/fix_content_data old.cd fixed.cd ','