chore(watchr): watchr scripts should output logs to terminal

Having the extra level of indirection by using logs/*.log file
only makes it more difficult to use these scripts. After this
change it will be enough to just start the watchr and watch the
terminal it was started in.

watchr-docs.rb

@@ -1,8 +1,7 @@
 # config file for watchr http://github.com/mynyml/watchr
 # install: gem install watchr
-# run: watch watchr.rb
-# note: make sure that you have jstd server running (server.sh) and a browser captured
+# run: watch watchr-docs.rb
 
 watch( '^src/|^docs/' )  do
-   %x{ echo "\n\ndoc run started @ `date`" > logs/docs.log; node docs/src/gen-docs.js &> logs/docs.log & }
+   system 'echo "\n\ndoc run started @ `date`"; node docs/src/gen-docs.js'
 end

watchr.rb

@@ -4,6 +4,5 @@
 # note: make sure that you have jstd server running (server.sh) and a browser captured
 
 watch( '(src|test|example)/' )  do
-   %x{ echo "\n\ntest run started @ `date`" > logs/jstd.log; ./test.sh &> logs/jstd.log & }
-   %x{ echo "\n\nlint started @ `date`" > logs/lint.log; rake lint &> logs/lint.log & }
+   system 'echo "\n\ntest run started @ `date`"; ./test.sh '
 end