Pager

- new file: pager.php
— previous / next links
— active state for current page
- added pagerOffset in SongRepository
Added pagerOffset and included pager

- included pager.php
- added pagerOffset to GetAllSongsSearch
- new result display („1-  5 from 10 in total“)
CSS - pager styles

- pager styles
- removed border-radius