Refactoring and benchmark without dictionary

contrib/experimental_dict_builders/randomDictBuilder/README.md

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+Random Dictionary Builder
+
+### Permitted Arguments:
+Input File/Directory (in=fileName): required; file/directory used to build dictionary; if directory, will operate recursively for files inside directory; can include multiple files/directories, each following "in="
+Output Dictionary (out=dictName): if not provided, default to defaultDict
+Dictionary ID (dictID=#): nonnegative number; if not provided, default to 0
+Maximum Dictionary Size (maxdict=#): positive number; in bytes, if not provided, default to 110KB
+Size of Randomly Selected Segment (k=#): positive number; in bytes; if not provided, default to 200
+
+###Running Test:
+make test
+
+
+###Usage:
+To build a random dictionary with the provided arguments: make ARG= followed by arguments
+
+
+### Examples:
+make ARG="in=../../../lib/dictBuilder out=dict100 dictID=520"
+make ARG="in=../../../lib/dictBuilder in=../../../lib/compress"