Add SetRowWidth function

[0x9ef]

SetRowWidth sets width of row, if width more then maximal (64) or less then minimal (12) -> sets default row width (32)

[mattn]

What basis of 8 or 64?

[olekukonko]

@0x9ef can you explain more ?

[0x9ef]

@olekukonko simply function for setting preferred row width without modifying global constants. In many situation, based MAX_ROW_WIDTH = 30 too small, i think, it would be easier to call SetRowWidth(sz) without modifying global constants in table.go

[olekukonko]

@0x9ef thanks for the explanation, can you add some test and example.
@mattn what do you think ?

[mchernyakov]

@mattn @olekukonko do you have any updates on this feature? Could be very good to have it.