Add separate line lenght for RST and add back Python 2.7.

[adiroiban]

This is a quick hack to support chevah/server

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In an ideal world, instead of defining separate configuration option for each checker, we should define separate configuration options based on file name.

For example

[scame:options:*.py]
max_line_lenght = 80

[scame:options:*.rst]
max_line_lenght = 1000

There is a lot of work for scame , starting with using a configuration text file, instead our big hack from chevah/server/pavement.py