2018/02/20 v.4b3 beta for QGIS2.99. Complete code refactoring with major
improvements (isochrone ranges as list, calculate from selected points in map
canvas), solved #4, #38, #40
2017/10/07 v.0.3.4 Fixed zoomToLayer bug (#35)
2017/09/24 v.0.3.3 Handled deprecated mapRenderer() function
2017/09/23 v.0.3.2 Added avoid_type feature for routing, auto-styling for acc
areas
2017/07/28 v.0.3.1 Fixed minor bugs (#20, #24, #27), removed support for overlap
areas
2017/05/30 v.0.3 Added support for overlap areas in accessibility analysis
2017/05/22 v.0.2 Added scrollbar and removed 'dissolve' option
