PyLint refactoring (indirect + algorithms)

[DanNixon]

This is an initial attempts at removing the PyLint issues from the indirect inelastic scripts and some of the Python algorithms.

There are some Indirect scripts that have not been touched as they will be removed by tickets that replace them with algorithms (namely anything related to the energy transfer and diffraction reductions).

After the reduction algorithms (http://trac.mantidproject.org/mantid/ticket/10854 & http://trac.mantidproject.org/mantid/ticket/10855) have been completed I will likely go over the list of violations again.

[DanNixon]

This issue was originally trac ticket 10706