ignore .idea meta files
documentation fix in ScannerImpl
Accept symbol 'foo//' as the name '/' with the prefix 'foo'. #30
Support symbols of the form 'foo//' as per CLJ-873

Such a symbol name will be read as name '/' with prefix 'foo'.
See also:
https://github.com/clojure/clojure/commit/a989c01eed7ce29cc7672b7a402e4f335d792882

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Merge branch 'feature/issue30' into develop

* feature/issue30:
  Accept symbol 'foo//' as the name '/' with the prefix 'foo'. #30
  documentation fix in ScannerImpl
  ignore .idea meta files