8075492: adopt recent IGV Summary: adopted recent sources, updated README, added build and run instructions; ignored IGV build files in Mercurial; adapted HotSpot Ideal graph printer to current IGV's data format schema; reintroduced control flow window and basic block layout Reviewed-by: kvn, roland Contributed-by: Andreas Woess <andreas.woess@oracle.com>, Bernhard Urban <bernhard.urban@oracle.com>, Christian Haeubl <christian.haeubl@oracle.com>, Doug Simon <doug.simon@oracle.com>, Gilles Duboscq <gilles.duboscq@oracle.com>, Lukas Stadler <lukas.stadler@oracle.com>, Peter Hofer <peter.hofer@jku.at>, Roland Schatz <roland.schatz@oracle.com>, Thomas Wuerthinger <thomas.wuerthinger@oracle.com>, Tom Rodriguez <tom.rodriguez@oracle.com>

build.xml.data.CRC32=3c2c6126
build.xml.script.CRC32=48934e60
build.xml.stylesheet.CRC32=eaf9f76a@1.45.1
# This file is used by a NetBeans-based IDE to track changes in generated files such as build-impl.xml.
# Do not edit this file. You may delete it but then the IDE will never regenerate such files for you.
nbproject/build-impl.xml.data.CRC32=3c2c6126
nbproject/build-impl.xml.script.CRC32=b26e57e5
nbproject/build-impl.xml.stylesheet.CRC32=0f381476@2.62.1
nbproject/platform.xml.data.CRC32=3c2c6126
nbproject/platform.xml.script.CRC32=6dcbd131
nbproject/platform.xml.stylesheet.CRC32=4e1f53d4@2.62.1