defends against libraries (such as ruby-units) which override division yielding non-zero values for fractions like 1/2
Merge pull request #795 from keithmgould/master

Use `#div` instead of `/` in case it's overridden by mathr or others.
use charset_encoder for param_decode
Merge pull request #801 from zendesk/grosser/parse

use charset_encoder for param_decode
Cope with raw sources that were read with the wrong encoding.

Force raw message source to binary encoding before doing CRLF
conversion, masking common issues when users read a message using the
default external encoding (UTF-8), resulting in invalid UTF-8 characters
that break the regexp used for CRLF conversion.

Fixes #736.
Merge pull request #681 from srawlins/allocate-less-things

Allocate less things

Conflicts:
	lib/mail/fields/common/common_field.rb
	lib/mail/utilities.rb
Loosen Travis-CI ruby versions; fix 1.9.2 not installable
autoload parsers for load-time speed and memory usage
Update CHANGELOG

[ci skip]
Bump to 2.6.2; update changelog
Merge branch '2-6-stable'

Conflicts:
	VERSION
	lib/mail/constants.rb
	lib/mail/elements/address.rb
	lib/mail/fields/common/parameter_hash.rb
	lib/mail/version.rb
support uu encoding
Merge pull request #796 from zendesk/grosser/uu

support uu encoding
Version bump to 2.6.3 and release
Change version to edge build
deal with complex encoding patters during collapsing
Merge pull request #789 from zendesk/grosser/jp-join

Bug:  Fix encoding collapsing not dealing with multiple encodings in 1 line
avoid failed encodings / stop bad charsets early
Merge pull request #775 from zendesk/grosser/failed-encoding

Bug: Avoid failed encodings / bad charsets
more encodings and their equivalents