Release 0.3.4

Merge pull request #143 from craue/fix-empty-env-argument

fixed that passing an empty array as env argument would clean default environment variables within the forked process

Fix for temporary files

Improve how we handle temporary files.

hasHtmlHeader and hasHtmlFooter new behave

hasHtmlHeader and hasHtmlFooter is return to their default state each time handleOptions() is called

Fix for --footer-html option

isFileFooter have missed argument - wkhtmltopdf throw error:
Error: --footer-html should be a URL and not a string containing HTML code

Temporary files management enhancements

• Now remove only temporary files created by the generator, on __destruct()
• Added a possibility to specify a custom temporary folder with a setTemporaryFolder() method
• Updated composer install instructions

toc & cover option updates

Merge pull request #117 from nullziu/temporary-file-url-cleanup-fix

Fixing temporary file unlink when header or footer html is an URL.

wkhtmltopdf 0.12.0

Merge pull request #81 from barryvdh/patch-1

Update wkhtmltopdf to 0.12

Snappy

wkhtmltopsd clear support with composer/packagist