0.8.1 : Code cleaning
0.8.0 : Migration for QGIS3
0.7.9 : filling @click_x and @click_y variables
0.7.8 : fix bug with integer fields (#7)
0.7.7 : Better tooltip build. Still impose a HTML version for better
interpretation by QT.
By default, tips are not displayed because of conflict with default qgis map
tip.
0.7.6 : Remove duplicate lines in tooltip, popup
0.7.5 : Support for QGIS expression for hotlinks (Peter Petrik)
0.7.4 : better use of QgsFeatureRequest
0.7.3 : some code cleaning
0.7.2 : bug fix : conflict between two lists and crash
0.7.1 : fix incompatibility with html tooltip
0.7 : QGis 2.2 compatible
0.6 : bug fix - numeric display fields failed.
0.5 : QGis 2.0 compatible
0.4 : 1.9 compatible
