Add linting for unsupported Clojure features in Rama

[nixin72]

This PR adds linting to error on unsupported usage of certain Clojure features in Rama dataflow code. There's 4 things it checks for:

• Use of keywords as functions (ex. (:a {:a 1 :b 2}) as opposed to (get {:a 1 :b 2} :a))
• Use of Java methods or constructors (ex. (.get myMap "key" :> *val))
• Use of Clojure primitives or clojure.core macros that expand to those primitives
  • Other macros expanding to use of Clojure primitives won't be caught in linting, will need to rely on the compiler for those
• Use of anonymous functions inside foreign-select
  • Note: This only captures anonymous functions declared inline in the foreign-select code, if the function is bound in a let and used in the foreign-select, that will not cause an error

[nixin72]

This is addressing #7

[nathanmarz]

Does this also lint forms preceded by clj!, where arbitrary clojure code is allowed? For example, this is valid: (+ 1 (clj! identity (.someMethod (:aaa some-var)))) :> *a)

[nixin72]

Ahh, no it doesn't take that into account.