Changed a few things

* Integrated # and ~ decorators into the expression system. Created associated operators.
* # and ~ decorators only affect their current line. That's more useful...
* Fix our priority system to evaluate left-to-right instead of right-to-left (if there was a reason why I did it this way initially, I don't remember it so ¯\_(ツ)_/¯)
* a lotta internal changes

Various other small adjustments, see the diff of REFERENCE.md for details.

test/tests/remove trailing spaces.lua

@@ -0,0 +1,34 @@
+local _={}
+_[14]={}
+_[13]={}
+_[12]={}
+_[11]={tags=_[14],text="c"}
+_[10]={tags=_[14],text=" "}
+_[9]={tags=_[13],text="b"}
+_[8]={tags=_[12],text="a"}
+_[7]={_[10],_[11]}
+_[6]={_[9]}
+_[5]={_[8]}
+_[4]={"return"}
+_[3]={"text",_[7]}
+_[2]={"text",_[6]}
+_[1]={"text",_[5]}
+return {_[1],_[2],_[3],_[4]}
+--[[
+{ "text", { {
+      tags = {},
+      text = "a"
+    } } }
+{ "text", { {
+      tags = {},
+      text = "b"
+    } } }
+{ "text", { {
+      tags = <1>{},
+      text = " "
+    }, {
+      tags = <table 1>,
+      text = "c"
+    } } }
+{ "return" }
+]]--