Add "Working on Features" section to readme

So that people don't have the same questions I did.
Don't require a radius for remote images.
Clean up trailing spaces globally.

I know it's not a big thing, but my editor highlights them in bright purple and auto-trims them on save… so i thought i'd clean them up :)
Merge pull request #54 from markrickert/version-0.6-trailing-spaces-cleanup

Clean up trailing spaces globally.
Add note about detect_dependencies being a rubymotion bug.
Merge pull request #53 from markrickert/version-0.6-readme-update

Add "Working on Features" section to readme
Initial pass at a refreshable table.
Update readme with implementation details for refreshing a tableview.
Make sure that we're running on ios6 or higher
fix readme typo.
Better readme formatting for refreshable.
Made callback pattern more consistent. Made all strings configurable. Updated documentation.
Add a warning if the user didn't implement the on_refresh method or they specified a callback method but didn't implement it.
Use more ruby syntax instead of Obj-C syntax.
Modify console log to name the actual on_refresh method they need to implement if they defined a different callback.
Better handling of the callback param.
Huzzah! Works brilliantly in ios 6 and ios 5 now!
Added an  method for adding any view to any other parent view with attributes. Closes issue #18.
Minor refactors to clean up the screen module
Initial stab at tablescreen tests