3.0.0-RC1

fix: ltrim doesn't work inplace, need to capture result
test: Properly mark coverage at class level
style: PER-1 space between cast and value
test: Cover regressions from PR#16
fix: Add null check to avoid trim(null)
Enhance comments for address handling in Rfc822.php
Revert "fix: Replace [$address] with (array)$address in Horde_Mail_Rfc822::parseAddressList()"
Merge pull request #16 from horde/fix_parseaddresslist
fix: Replace [$address] with (array)$address in Horde_Mail_Rfc822::parseAddressList()