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.
Add simple header example to readme
Merge pull request #588 from ahawkins/patch-1

Add simple header example to readme
Body#split! fixed to not raise error in case missing boundary, spec added
Merge pull request #597 from railsware/missing_boundary

Body#split! fixed to not raise error in case missing boundary
Revert invalid spec change from 034f132f7c49382bd61bd9bad3ce3c48f498b60d
Fix Message comparison method to ensure there's no side-effects.

Comparing a Message w/o message_id set to another object would set it's
Message-ID to a temporary value.  Ditto for the object compared to.
Merge pull request #603 from commandprompt/fix-message-comparison-take2

Fix message comparison: take 2
Clean up Message#== to remove superfluous assignments and return value handling. Move temp message_id assignment into the ensure block.
Added RubyMine/IntelliJ IDEA configuration directories and rbenv config files to .gitignore
Added bcc RSpec matcher
don't change encoding of string input to Mail.new
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