bring warbler's deps somehow (at least fairly) up to-date
we shall fail without the bundler gem installed
WarMain extends JarMain for code reuse
more refactoring towards an (almost) working `-S rake -T`
pass in cli args to processArguments; file: URIs seem to work better
working better when app gets fully extracted
ENV should be cleared otherwise it might interfere with local ruby installation
actualy avoid ENV.clear and setup GEM_PATH (besides GEM_HOME) instead
package db/ dir + include *file-s (e.g. Rakefile)  by default
exclude tmp/cache since it might contain (compiled) assets
avoid RbConfig warns + rdoctask load error on MRI 1.9.3
RCov 1.0.0 seems to only compile on MRI 1.8
include a runnable task (executable wihout the web server)
this allows to make a war for running packagted binaries such as `rake db:migrate` while not embedding a web server
provide some explanation for java -jar rails.war (without -S)
Merge remote-tracking branch 'kares/runnable' into gh-130

Conflicts:
	.gitignore
	Gemfile
	ext/JarMain.java
	spec/sample_war/Rakefile
Merge pull request #136 from jruby/gh-130

java -jar rails.war -S rake db:migrate