bump version in README, add TODO

README.md

@@ -12,7 +12,7 @@ Rhai's current feature set:
 * No additional dependencies
 * No unsafe code
 
-**Note:** Currently, it's version 0.4.0, so the language and APIs may change before they stabilize.*
+**Note:** Currently, it's version 0.5.1, so the language and APIs may change before they stabilize.*
 
 ## Installation
 
@@ -20,7 +20,7 @@ You can install Rhai using crates by adding this line to your dependences:
 
 ```
 [dependencies]
-rhai = "0.4.0"
+rhai = "0.5.1"
 ```
 
 ## Related

TODO

@@ -0,0 +1,15 @@
+pre 1.0:
+	- loop
+	- binary ops
+	- unary minus and negation
+	- bool ops
+	- basic threads
+	- stdlib
+	- comments
+	- floats
+	- REPL (consume functions)
+1.0:
+	- decide on postfix/prefix operators
+	- ranges, rustic for-loop
+	- advanced threads + actors
+	- more literals