initial release on github

1.2.0
added capability to keep table sorted. This option defaults to false as it is mainly optional. Portfolio Performance will read tables which are unsiorted.

• note 1: this option likely comes with big performance implications
• note 2: might cause issues on existing, unsorted tables,
• note 3: might cause issues when reversing tables and adding entries on reversed table
• note 4: might cause issues when modifying the underlying table manually and not regarding sorting