Echo log messages by default

There are a number of critical errors which cause the server to hang, which are only reported through syslog. Not specifying --le at the command line causes these to look like the server is actually working when it's in a failed state.
Build sample data importers as part of the core orly apps
Refactor Makefile slightly

- make STARSHA w/ flags more convenient
- make a single variable for "all main binaries"
Merge pull request #64 from cmaloney/misc_cleanup

Misc. cleanup
Removing superfluous headers from .h and .cc files in orly/server
moving function definitions in device_util to .cc
additional device_util cleanup, added RAII object to manage posix_memalign ptrs
replaced memset call to Base::Zero