Add generic support for CSV files

[marcmo]

add support csv files with and without headers

[DmitryAstafyev]

I would split this task into:

• [ ] saving (exporting) data from table-views into CSV
• [ ] opening CSV files as table (I am not sure about implementing this point as soon as text files out of parsing and we will not have a way to put chipmunk's delimiters into it to mark columns positions)