Refactor common entry code in elaborate methods into the Backend super class.
Refactor ChiselError to implement a log4j-compatible interface.
Report errors in a single place, the finally clause of chiselMain.
add tests for assert and printf generation
merged from ucb-bar master
Merge branch 'master' of git://github.com/ucb-bar/chisel
debugging statement should not have made it through
fix: generation of .dot output with components
Merge pull request #16 from smirolo/master

done
forgot to commit the unit test
Merge pull request #17 from smirolo/master

forgot to commit the unit test
Fix embarrassing off-by-one error in printf