Feature/progress (#17)

* improve example gui. Add simple pages

* return old progress bar with example

* base progress with steps, there is bug with step? 1 ~= 1, small delta?

* polish progress, check float error case

* add callback on end of "to" function, value check

* start of green/red in progress

* add first version of rich progress bar

* make green bar darker

* rich bar fixes

* add delay, before filling in rich progress

* PR fixes

* remove dublicate of 'progress_rich'

druid/settings.lua

@@ -12,6 +12,14 @@ M.button = {
 	SCALE_CHANGE = vmath.vector3(-0.05, - 0.05, 1),
 }
 
+M.progress = {
+	SPEED = 5, -- progress bar fill rate, more faster
+	MIN_DELTA = 0.005
+}
+
+M.progress_rich = {
+	DELAY = 1, -- delay in seconds before main fill
+}
 
 
 function M.get_text(name)