Update True Page Copy
Update True Page Copy

Added TheAaron's safe imgsrc function and changed property-getting(???)
for easier updates in the future.

Cazra/roll20-api-scripts,NathaTerrien/Natha-roll20-api-scripts,symposion/roll20-api-scripts,shdwjk/roll20-api-scripts,shdwjk/roll20-api-scripts,jflo/roll20-api-scripts,Roll20/roll20-api-scripts,Cazra/roll20-api-scripts,shdwjk/roll20-api-scripts,Cazra/roll20-api-scripts,Roll20/roll20-api-scripts,symposion/roll20-api-scripts,Roll20/roll20-api-scripts,NathaTerrien/Natha-roll20-api-scripts