Merge branch 'hotfix-0.3.1'
Merge branch 'hotfix-0.3.22
Bumped version number.
Fixed the wrong indexing of the ls370 user curves. The term chars used by the ls370.ieee command were wrong.
Merged hotfix-0.3.3
Using join to connect strings.
Moved SimulatedConnection to connection module; Moved Nullhandler to misc module.
Updated documentation.
Modified the input channel interface of the ls340 and ls370 driver.

Both now provide a similar interface. They can be accessed via the `input`
attribute. E.g.

    >>> ls340.input['A'].kelvin
    >>> ls370.input[5].kelvin
Fixed Bug, channels start with a 1.
Merge branch 'feature-refactoring' into develop