3.5.1: Removed unnecessary import pip, a problem seen in QGIS 3.4.0 plugin
installation. User may need to install pyxform using easy_install. Recommend to
upgrade to QGIS 3.4.1. 3.5: Now installing package 'pyxform' automatically.
Tested in Mac and Windows. 3.4: Changes Major refactoring to replace 'print'
statements with QgsMessageLog: It avoids QGIS crashes and make it thread-safe.
Now user can see all print statement outputs in log messages under 'QRealTime'
tag. Some UI Improvements and minor bug fixes.
