Moved menu into Edit, where it resides in many other editors.

+ spaceDefaultToTab, so the script's DEFAULT_TAB_WIDTH (4) is used to find spaced indents.  Needed since currently, my configured Tab Size is 2, which spaceToTab translates twice as many tabs needed to indent.
ensured blank lines were whitespaceless
Merge pull request #5 from tomByrer/master

v1.1 +spaceDefaultToTab (4 to arbitrary), Moved into Edit menu, impoved Readme