Update README.md

Added missing square bracket so markdown works as expected.
Merge branch 'release/0.10'

Conflicts:
	README.md
Merge branch 'release/0.14'
Merge branch 'develop'
updated dependency
submodule
- pagination
Merge branch 'feature/pagination' into dzb
submodule
Merge branch 'develop' of https://github.com/readium/readium-js-viewer into feature/pagination
- submodule
Merge branch 'feature/pagination' into dzb
Merge branch 'dzb' of https://github.com/GermanCentralLibraryForTheBlind/readium-js-viewer into dzb
- added  test book
- fix opf -> delete double entry
- pagination output in percent
Merge branch 'feature/pagination_percent' into dzb
update
- fixed merge
- pagination css properties