TODO moved out to readme.txt which contains latest interesting issues - they should become JIRAs when the dust has settled

org.springframework.expression/readme.txt

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+List of outstanding things to think about - turn into JIRAs once distilled to a core set of issues
+
+High Importance
+
+- In the resolver/executor model we cache executors.  They are currently recorded in the AST and so if the user chooses to evaluate an expression
+in a different context then the stored executor may be incorrect.  It may harmless 'fail' which would cause us to retrieve a new one, but 
+can it do anything malicious? In which case we either need to forget them when the context changes or store them elsewhere.  Should caching be
+something that can be switched on/off by the context? (shouldCacheExecutors() on the interface?)
+
+Low Importance
+
+- For the ternary operator, should isWritable() return true/false depending on evaluating the condition and check isWritable() of whichever branch it
+would have taken?  At the moment ternary expressions are just considered NOT writable.