Check the ~/.codeintel/codeintel.log file to see if there are any errors in it or in the Sublime Text console.
Delete the directory with the CodeIntel database ~/.codeintel/db and restart Sublime Text.
Building process is no longer distributed with this repository. You need to get SublimeCodeIntel/CodeIntelSources to run build.sh. More information in SublimeCodeIntel/CodeIntelSources/src.