feat(logger): Add date/time stamp to log output
feat(logger): Add date/time stamp to log output

The `"%d{DATE}"` in the log pattern adds a date and time stamp to log
lines.
So you get output like this from karma's logging:
```
30 06 2015 15:19:56.562:DEBUG [temp-dir]: Creating temp dir at /tmp/karma-43808925
```
The date and time are handy for figuring out if karma is running slowly.

jamestalmage/karma,karma-runner/karma,hitesh97/karma,johnjbarton/karma,youprofit/karma,skycocker/karma,vtsvang/karma,brianmhunt/karma,karma-runner/karma,IveWong/karma,youprofit/karma,wesleycho/karma,jamestalmage/karma,kahwee/karma,jjoos/karma,kahwee/karma,Klaudit/karma,panrafal/karma,KrekkieD/karma,hitesh97/karma,harme199497/karma,Sanjo/karma,Klaudit/karma,astorije/karma,IveWong/karma,david-garcia-nete/karma,patrickporto/karma,skycocker/karma,pmq20/karma,clbond/karma,ernsheong/karma,KrekkieD/karma,patrickporto/karma,SamuelMarks/karma,wesleycho/karma,powerkid/karma,tomkuk/karma,marthinus-engelbrecht/karma,simudream/karma,chrisirhc/karma,unional/karma,IveWong/karma,gayancliyanage/karma,hitesh97/karma,buley/karma,stevemao/karma,chrisirhc/karma,clbond/karma,youprofit/karma,timebackzhou/karma,simudream/karma,skycocker/karma,maksimr/karma,jjoos/karma,simudream/karma,SamuelMarks/karma,ernsheong/karma,powerkid/karma,pedrotcaraujo/karma,clbond/karma,unional/karma,chrisirhc/karma,timebackzhou/karma,vtsvang/karma,aiboy/karma,aiboy/karma,buley/karma,codedogfish/karma,brianmhunt/karma,powerkid/karma,gayancliyanage/karma,pedrotcaraujo/karma,brianmhunt/karma,jamestalmage/karma,rhlass/karma,Klaudit/karma,jjoos/karma,stevemao/karma,codedogfish/karma,panrafal/karma,marthinus-engelbrecht/karma,karma-runner/karma,pmq20/karma,pedrotcaraujo/karma,panrafal/karma,buley/karma,IsaacChapman/karma,Sanjo/karma,rhlass/karma,youprofit/karma,Klaudit/karma,shirish87/karma,Sanjo/karma,xiaoking/karma,shirish87/karma,SamuelMarks/karma,vtsvang/karma,pedrotcaraujo/karma,mprobst/karma,Dignifiedquire/karma,astorije/karma,hitesh97/karma,johnjbarton/karma,johnjbarton/karma,chrisirhc/karma,pmq20/karma,patrickporto/karma,Dignifiedquire/karma,Dignifiedquire/karma,jamestalmage/karma,xiaoking/karma,codedogfish/karma,powerkid/karma,skycocker/karma,marthinus-engelbrecht/karma,kahwee/karma,timebackzhou/karma,patrickporto/karma,wesleycho/karma,IsaacChapman/karma,unional/karma,oyiptong/karma,stevemao/karma,IveWong/karma,xiaoking/karma,mprobst/karma,harme199497/karma,david-garcia-nete/karma,kahwee/karma,pmq20/karma,rhlass/karma,rhlass/karma,gayancliyanage/karma,xiaoking/karma,gayancliyanage/karma,KrekkieD/karma,buley/karma,jjoos/karma,tomkuk/karma,tomkuk/karma,oyiptong/karma,timebackzhou/karma,aiboy/karma,clbond/karma,mprobst/karma,ernsheong/karma,tomkuk/karma,johnjbarton/karma,astorije/karma,oyiptong/karma,brianmhunt/karma,maksimr/karma,harme199497/karma,harme199497/karma,marthinus-engelbrecht/karma,aiboy/karma,unional/karma,david-garcia-nete/karma,codedogfish/karma,KrekkieD/karma,astorije/karma,IsaacChapman/karma,Dignifiedquire/karma,Sanjo/karma,stevemao/karma,maksimr/karma,shirish87/karma,vtsvang/karma,karma-runner/karma,wesleycho/karma,oyiptong/karma,IsaacChapman/karma,simudream/karma