Pagination button to first page

## 1.4.2
- **Added** a *pager-link to the first page*, if none is existent
- **Added** function to *remove unnecessary pager-links* and therefor fixing styling issues on original site
- **Added** a *page-select-box* to get to a particular threat- or forums-page instantly
- Refactored core files to support `.less` stylesheets. Client now works with minified css, so styles should apply slightly faster