Merge pull request #1 from Antek88/master

Refactoring, add excel export. BC Break
Merge pull request #2 from Antek88/master

Readme
Merge pull request #3 from Antek88/master

HTML & XML exports
Merge pull request #4 from Antek88/master

JSON support
Merge pull request #5 from Antek88/master

Refactor using Property-access Symfony component
Merge pull request #6 from Antek88/master

PHP 5.3 fix
Merge pull request #7 from Antek88/master

Docs typo
Merge pull request #8 from Antek88/master

Add support for render data to memory
Merge pull request #9 from Antek88/master

Refactoring, add hook option
Merge pull request #10 from Antek88/master

addHook - support object
Merge pull request #13 from Antek88/master

hook - small fix
Merge pull request #14 from Antek88/master

small fix
Merge pull request #15 from Antek88/master

Fix
Merge pull request #16 from Antek88/master

closure & escape fix
Merge pull request #17 from Antek88/master

Update doc
Merge pull request #18 from Antek88/master

Update doc
Merge pull request #19 from Antek88/master

Update doc
Merge pull request #20 from Antek88/master

skip header flag
Merge pull request #21 from Antek88/master

update doc
Merge pull request #22 from Antek88/master

Changes, xml fix, license file