die on fail
new msgmap structure
seneca.die added, handle_error_args
enhanced error handling for action callbacks, tests now mostly silent
Merge branch 'master' into 0.6.0
syntax error msgs updated
action error msgs
fixed templating so that it won't blow up on reserved words
add action param spec test
docco seneca.js p1
merge down 0.6.0 error handling changes, tests pass