refactor due date tag on todo for mobile and non-mobile view
fix test regression
use helper class for both due date and show from date
rename module to reflect its generic use
add basic tests for date label helper
update gems and fix test regressions
add attachment model and add paperclip
change message gateway to save received email as attachment to the todo
wire up downloading attachments from todo partial
ignore attachments in git repo
remove setting utf-8 on every request

this encoding stuff should be handled better with recent versions of rails and ruby
make attachments accesible from user model and fix cleaning up attachment on destroy
refactor adding attachments in message_gateway

and remove gsub magic with correct tempfile parameter
fix failing tests

* tests failed on a local changes site.yml
* somehow universal_newline leaves \r, so bring back gsub to remove them