Updated docs

There is still stuff to do

docs/objects/Progressbar/getProgress.md

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+## getProgress
+Returns the current progress status
+
+#### Returns:
+1. `number` progress (0-100)
+
+#### Usage:
+* Creates a progressbar, sets the current progress to 50 and prints the current progress
+```lua
+local mainFrame = basalt.createFrame()
+local aProgressbar = mainFrame:addProgressbar()
+aProgressbar:setProgress(50)
+basalt.debug(aProgressbar:getProgress())
+```