Merge branch 'release/2.0.2' into develop
Suppress errors since some stream wrappers emit warnings
test #156: Define mb_strlen and mb_substr if they are not available natively
Update installation instructions

Simplify instructions to composer require
headers in tables now have a min-width
Synced with interface changes.

Lookup without fallback wasn't working at all.
Bump version number to 2.0.3
Merge branch 'release/2.0.3'