sanity checking result of asl_get()

NSString -stringWithUTF8String: raised an exception if attempting to
pass a null C string, which is a possible value of asl_get().
Merge pull request #31 from rcarlsen/fix/log-null-pointer-exception

Null pointer exception in logging method
Use bundleForClass
Merge pull request #33 from segiddins/bundle-for-class

Use bundleForClass
Shipped Overcast
Merge pull request #34 from pkamb/patch-1

Shipped Overcast
adding a text display mode to the log viewer
Merge pull request #35 from rcarlsen/feature/scroll-console-view

Adding a text display mode to the log viewer