Make info use optional extra parameter

Info accepts a second parameter to only return part of the info. E.g. Info Memory. This commit should make the library accept that.
Created test for info with specific section

Added test_info_section which should get only the memory section of the info command
Changed coding style, variable name
Changed false to FALSE as styleguide mandates
Merge pull request #37 from PanManAms/develop

Make info use optional extra parameter