Log Message:
Update contao30 to 3.0.1 (Contao 3.0.1.).

Also added Slovak language files.

Version 3.0.1 (2012-11-29)
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### Fixed
Exclude the undo module from the list of allowable back end modules (see #5056).

### Fixed
`Validator::isAlias()` did not support Unicode characters (see #5033).

### Fixed
Group the search results by their parent IDs when searching the extended tree
view, e.g. the article tree (see #5051).

### Fixed
Correctly generate the debug bar markup on XHTML pages (see #5031).

### Fixed
Handle radial gradients when importing style sheets (see #4640).

### Fixed
More abstract and effective algorithm to determin the number of files in the
"purge data" maintenance module (see #5028).

### Fixed
Fixed two wrong class paths (see #5027).

### Fixed
Correctly add event images to the templates (see #5002).

### Changed
Replaced the automatic copyright notice with a meta generator tag.

### Fixed
Do not strip tags from passwords (see #4977).

### Fixed
Correctly show the number of returned rows in the debug bar (see #4981).

### Fixed
Correctly add the RSS feed base URLs (see #4994).

### Fixed
Fixed an issue in the mediaelement.js MooTools adapter (see #4917).

### Fixed
Correctly assing the classes "first" and "last" in the \ 
(mini) calendar if the
week does not start on Sunday (see #4970).

### Fixed
Correctly handle URL parameters appended to the empty domain (see #4972).