Create bioformats_all.jar and bioformats_nolog.jar

The Ant 'tools' target and default Maven goal will create both jars.
bioformats_all.jar is the union of loci_tools.jar and ome_tools.jar;
bioformats_nolog.jar is the same as bioformats_all.jar, but without
slf4j-log4j and log4j.
Fix 'tools' target dependencies
Remove bioformats_all.jar
Rename bioformats_nolog to bioformats_package
Implement pre-loading for .sdt files in the interest of performance as an option.
Add JAR file to Bio-Formats MATLAB toolbox and prefix it
Add tools dependency in dist-matlab target
Add new Bio-Formats package JAR
Refactor bfCheckJavaPath() function
Fix unit tests and MATLAB M files
Change default threshold in bfCheckJavaMemory

Trigger warning when runtime memory is equal to minMemory - 64
Update build systems to use logback instead of log4j
Move IJStatusEchoer and ImporterProcess to logback
Remove checkLibrary call for log4j
Add logback jars
Create LogbackTools from DebugTools

Rather than attempt to do all of the logback configuration
in the ReflectedUniverse, this commits moves the LB logic
out into LogbackTools and only references those static methods
from the ReflectedUniverse. The next step will be to do this
behind a SPI interface.
Minor change to scans-dep comment on Location
Remove explicit logback from lib.dir

logback is also found in the artifacts directory
during execution causing a warning to be printed
during testing.
Migrate test-suite to use logback (or nothing)
Add small whats-new place holder