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/text escaping.lua

@@ -0,0 +1,38 @@
+local _={}
+_[17]={}
+_[16]={}
+_[15]={}
+_[14]={}
+_[13]={tags=_[17],text="decorators # tag ~ condition $ fn"}
+_[12]={tags=_[16],text="other codes \n \\ \9"}
+_[11]={tags=_[15],text="quote \""}
+_[10]={tags=_[14],text="expression {a}"}
+_[9]={_[13]}
+_[8]={_[12]}
+_[7]={_[11]}
+_[6]={_[10]}
+_[5]={"return"}
+_[4]={"text",_[9]}
+_[3]={"text",_[8]}
+_[2]={"text",_[7]}
+_[1]={"text",_[6]}
+return {_[1],_[2],_[3],_[4],_[5]}
+--[[
+{ "text", { {
+      tags = {},
+      text = "expression {a}"
+    } } }
+{ "text", { {
+      tags = {},
+      text = 'quote "'
+    } } }
+{ "text", { {
+      tags = {},
+      text = "other codes \n \\ \t"
+    } } }
+{ "text", { {
+      tags = {},
+      text = "decorators # tag ~ condition $ fn"
+    } } }
+{ "return" }
+]]--