update changelog

Release v5.3.6

Release v5.3.5

v5.3.4 Release

Add Sample Time option to PWM and RPM Input options (kizniche#302), F…

…ix issues with PWM and RPM Inputs (kizniche#306)

Fix Live Data page displaying special characters (kizniche#304), Fix …

…PWM and RPM Input issues (kizniche#302), Release v5.3.2

Fixes for PWM/RPM Inputs, release 5.3.1

v5.3.0 Release

update version number

Add ability to set time to end repeating duration method