Release notes - SimplySwim - Version v75.1.9

Release notes - SimplySwim - Version v75.1.9

** Bug
* [SS-138] - Lesson Invoice Calculation > Exclude Price Level from Enrolment/Student Pricing within the same family
* [SS-522] - Lesson Renewal Calculations > Exclude Price Override from Family/Student billing calculations
* [SS-524] - Direct Debit > Add Lesson Value Calculation to new DD Module

** Improvement
* [SS-519] - Family Finance > Produce individual PDF Tax Invoice
* [SS-525] - Attendance > Send SMS > Prevent mulitple messages to the same Family