Adds doxygen docs to the exported headers in the drmemtrace framework and includes them all in the doxygen-generated html docs.
Adds hierarchy to the html docs file list to group the drmemtrace headers together.
Moves drmemtrace.h from ext/include/ to tools/include/drmemtrace with the analysis tool headers and adds a new CMake function use_DynamoRIO_drmemtrace_tracer() for finding the header.
Adds a tracer customization section to the drcachesim prose docs.
Installation tested manually and tweaked to remove superfluous drcachesim debug files.
Issue: #2006 (closed)