To install a version of CSSParser, use one the following scripts inside a playground or in your project baseline.
Metacello new
baseline: 'CSSParser';
repository: 'github://pharo-contributions/CSSParser:master';
onConflictUseLoaded;
loadspec baseline: 'CSSParser' with: [ spec repository: 'github://pharo-contributions/CSSParser:master' ].To install CSSParser simply execute the following script in your Pharo image:
Metacello new
baseline: 'CSSParser';
repository: 'github://pharo-contributions/CSSParser:master';
load.