add 'Config.defaultFrom(mode)', use for replConfig
add test for whether hadoop.tmp.dir is used
Force JobConf to evaluate values in Config.fromHadoop (fixes #1014)
make ReplTest actually run in Hadoop mode again and now just match against the evaluated tmp dir
rename 'replConfig' and make it a var, also comment on 'Config.fromHadoop'
use getter/setters for config (have to be clever to pick up defaults from mode)
mutability is the worst thing ever. make 'tmpReplJarConfig' lazy to avoid initialization problmes
sure enough, you have to re-execute this each time you run
fix scald.rb to allow running REPL remotely again

Needed to add repl jar to classpath for case where no file/job is specified
refactor to only create tmpjar for execution
Merge pull request #1015 from bholt/bholt/config-merging

Fix replConfig merging and evaluate values in Config.fromHadoop