Readme: Fix outdated openfl command
Merge pull request #57 from Gama11/patch-1

Readme: Fix outdated openfl command
Match exact icon matches before matching scalable matches, allow later dynamic icons to override earlier ones
Give dynamic and fixed size icons equal priority for exact matching, use the last valid match
Process libraries by writing and reading from separate temporary files
Update to 1.2.8
Fix run command for file names with spaces on windows, fixes #58