Upgrade gems to fix problem with broken content

The older versions of httparty and json made all downloaded files break
as the encoding was completely screwy when run on ruby 2.1.1 (and
possible others).

This patch also fixes #70 and #92.
Update README.md

Fix english
Fix typo in bin/theme
Remove whitespace and indent case statements

Case statement indentation a la https://github.com/styleguide/ruby
Display message while uploading and removing assets

This commit creates a method, `show_during`, which shows a message
before doing a thing, does the thing, then prints carriage returns to
hide the message.
Use the real time when printing messages

For slow connections or large files, the timestamp is often wrong
because it's saved at the start of the action, not on completion of the
action.
Merge pull request #95 from peterhoeg/upgrade_httparty_and_json_to_fix_broken_content

Upgrade gems to fix problem with broken content
Interpolate rather than concatenate and methodize timestamp
Merge pull request #98 from SuguToys/progress-messages

Display message while uploading and removing assets