Removed the key of the asa_value table, and improved a bit the comments around the tables.
Removed the key of the asa_value table, and improved a bit the comments around the tables.

filipefigcorreia/TracAdaptiveSoftwareArtifacts,filipefigcorreia/TracAdaptiveSoftwareArtifacts,filipefigcorreia/TracAdaptiveSoftwareArtifacts