Adding a cookbook about tiles. Closes #481
Typo
Adding menu link
translating Referer Header cookbook to EN
translating components docs to english
Changing the version of xstream because of inconsistency in version
Compress images
Remove task imagemin
Merge pull request #605 from vitornp/optimizeImg

Compress images and removing imagemin
Removing imagemin (related to #605)
Fixing typo
Info about tiles.xml
Merge pull request #622 from caelum/ot-doc-tiles

Adding a cookbook about tiles. Closes #481
Replacing tabs with 4 spaces so that Java code doesn't get too large
adding Chico's suggestion
minors from translation
Merge pull request #632 from caelum/translatingRefererHeaderCookbook

translating Referer Header cookbook to EN
fixing rodrigo's minors
improving first component example
Merge pull request #633 from csokol/translating-components

translating components docs to english