Add readme and raise default minimum size on CLI

README.md

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+# IOAGoGo!
+
+IOAGoGo is a library for doing basic IO benchmarking using various
+different methodologies available in core Java. It's extensible and
+should be usable anywhere that Java is.
+
+# Command line interface
+
+IOAGoGo includes a basic command line interface for benchmarking
+the included strategies.
+
+Build it with:
+
+    ./gradlew commandJar
+
+Run it with
+
+    java -jar build/libs/ioagogo.jar
+
+# Sample runs
+
+Mac OSX 10.10.1, Mac Mini Server (Mid 2011), on a spinning, SATA disk,
+with Oracle Java 1.8.0\_25-b17, 64-Bit server VM:
+
+![Mac OSX 10.10.1, Mac Mini Server (Mid 2011), on a spinning, SATA disk,
+with Oracle Java 1.8.0\_25-b17, 64-Bit server VM sample run](samples/IOAGoGo-MacOSX-Java1.8.0.svg)
+
+# Acknowledgements
+
+Thanks to David Robert Nadeau, Ph.D., whose fine article
+[Java tip: How to read files quickly](http://nadeausoftware.com/articles/2008/02/java_tip_how_read_files_quickly)inspired this library.
+
+# License
+
+Copyright (c) 2014-2015 Emil Ong
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject
+to the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
+ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
+CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.