Extracted Gremlin imports into utility class

Console.java now relies on a new class, ConsoleSetup.java, to supply a
list of imports/import-statics to execute when bootstrapping a Gremlin
shell for Titan.  The utility class also contains a main method that
writes the imports to stdout or a file.  This is useful for generating
a Rexster <init-script> file for use with Titan that imports all the
same symbols as an interactive gremlin.sh session.  It also avoids
copy-pasting, so that any time we update the import list effective in
gremlin.sh, we will also automatically update the Rexster environment.
Refactored titan-dist and ConsoleSetup

It seems that executing import and import-static statements in a
Rexster <init-script> has no effect on client connections.  The log
shows that the script containing imports was parsed, but the symbols
still don't exist when connecting to the server with
rexster-console.sh.  I already know that the <import> and
<import-static> tags in rexster.xml work for this purpose, so I
refactored ConsoleSetup.java to generate a properties file containing
imports = (comma separated symbols...) and staticimports = (comma
separated symbols...).  This isn't as tidy as using a Groovy
init-script, but it works.
pom.xml changes for titan-dist-* packages
Renamed titan.sh to stack.sh, deleted old files

The files in titan-all/src/ have been superseded by copies under
titan-dist and are no longer used for anything.  Deleted.
Renamed titan-*.properties files in config

Also added HBase and HBase+ES configs copied from bin
Change log4j configuration in titan-all distro

Now the Cassandra process reads from conf/log4j-cassandra.properties
and the Rexster+Titan process reads from
conf/log4j-rexstitan.properties.  These processes write to both stdout
and to the files log/cassandra.log and log/rexstitan.log.

Also deleted the obsolete script titan.bat which still tried to start
the recently-deleted RexsterTitanServer main class.
Remove bin/*.local files from distro archives

This commit deletes some Titan configuration files from the bin
directory of zip/tar archives built by titan-dist and its submodules.
In lieu of these unusually named files in the bin directory, an
expanded set of config files copied from the /config directory of the
repo is now copied to the /conf directory in the zip/tar achives.
Modfiying rexster log4j path

Doesn't seem to be working... Rexster might be overridding the
command-line log4j config at runtime...