Update README example with smtp and mailcatcher

Hi, i would suggest to add this patch, it's very helps me during testing. Sorry for bad English.
Stop quote_phrase from modifying input string encoding

In the case where it acted to quote the input string, quote_phrase
shouldn't modify the encoding of the input string to be ASCII-8BIT, but
should leave the encoding as it found it.
Encoding test is invalid in Ruby 1.8.
Added RubyMine/IntelliJ IDEA configuration directories and rbenv config files to .gitignore
Added bcc RSpec matcher
Added missing Ruby syntax highlights to the README
Merge pull request #622 from parndt/patch-1

Added missing Ruby syntax highlights to the README
Stable sort method for parts list
Improvement for fold method
Rescue StandardError instead of Exception.
Change docs to only rescue StandardError
Fix for multipart emails without a set content_type.
Merge branch 'dont_rescue_Exception' of github.com:kongregate/mail
Merge branch 'force_encoding_on_copy' of github.com:substars/mail
Merge branch 'master' of github.com:ThomasKoppensteiner/mail
Merge branch 'feature/stable_sort_for_parts_list' of github.com:youseke/mail
Remove redundant condition
Merge commit 'feature/improve_fold_method'
Merge branch 'master' of github.com:daveslutzkin/mail
Merge branch 'patch-1' of github.com:woto/mail