feat(@angular/cli): log unhandled exceptions
feat(@angular/cli): log unhandled exceptions

Whenever an unhandled exception during command processing occurs, the message and stack trace will be saved to a debug log located in a temporary directory.  The user will be informed of the log location as well as the exception message and instructions to file a bug report at the GitHub repository.

ocombe/angular-cli,geofffilippi/angular-cli,catull/angular-cli,geofffilippi/angular-cli,Brocco/angular-cli,DevIntent/angular-cli,DevIntent/angular-cli,geofffilippi/angular-cli,angular/angular-cli,angular/angular-cli,beeman/angular-cli,beeman/angular-cli,Brocco/angular-cli,filipesilva/angular-cli,clydin/angular-cli,Brocco/angular-cli,clydin/angular-cli,manekinekko/angular-cli,clydin/angular-cli,ocombe/angular-cli,angular/angular-cli,beeman/angular-cli,ocombe/angular-cli,filipesilva/angular-cli,hansl/angular-cli,DevIntent/angular-cli,Brocco/angular-cli,hansl/angular-cli,Brocco/angular-cli,filipesilva/angular-cli,catull/angular-cli,catull/angular-cli,manekinekko/angular-cli,hansl/angular-cli,catull/angular-cli,clydin/angular-cli,beeman/angular-cli,geofffilippi/angular-cli,ocombe/angular-cli,manekinekko/angular-cli,filipesilva/angular-cli,DevIntent/angular-cli,angular/angular-cli,hansl/angular-cli,DevIntent/angular-cli,ocombe/angular-cli