Unclosed parenthesis counting

Improve parenthesis control for unclosed parenthesis by @whyte624

Improved UTF8 and domain validations

• Improve domain validations for invalid domain tokens e.g ", >, <
• Added capturing group for all non ASCII chars to avoid flagging them as EmailLexer::S_EMPTY
• Fix (only for ") #57
• Fix #55

Fix version of dependency

• Fixed dependency for doctrine/lexerto ~1.0, thanks @Ocramius for tagging.
• Fixed bug on test@fo;o.com like emails.
• Minor fixes on documentation.

UTF8 Character improvements

Control of ill formed UTF-8 chars and control characters for wrongly written emails with UTF8 chars
Thanks @masakielastic for reporting

Fix regression from 1.2.4

A regression was introduced in 1.2.4 for long local parts.
Thanks to @craue

Strict and DNS check bug fix

See #32
Error was caused by wrong negation and use of checkdnsr wasn't been taken into account when strict was set.
Now emails with warnings will fail when strict && DNS check or when strict with no DNS
Also, DNS check only raises warnings.

Improved detection of invalid emails

Valid Emails

• Improved detection of 4 valid email addresses

Invalid Emails

• Added 21 invalid emails in tests and added them to the validation, they are now detected as invalid.

Quoted Part Improvements

Bug fixes reported by @brianfreytag on issue #19:

Invalid emails:

• brian,[email protected]
• bri[an][email protected]

Valid emails:

• "brian,freytag"@gmail.com
• "brian freytag"@gmail.com
• "brian@freytag"@gmail.com
• brian\ [email protected]

Are now detected as such.

Remove dependency with checkDNS

Change DNS validation to default to true instead of false by @brianfr…

…eytag

Code Improved

• Code has been improved to allow for later refactors
• A bug was fixed regarding comments in the domain part. Check the test cases for details
• The validator is now 20% slower (in CLI, with PHP 5.5) due to several classed being involved