Rename stig executables

stig/stig (The compiler) -> stigc
stig/server/stig (Indy) -> stigi
stig/client/stig (C++ Client) -> stig_client

Closes #69
Merge pull request #106 from cmaloney/rename_binaries

Rename stig executables
Make a 'make install'

Enables further progress on #101. Binaries are now installed in the
bin sub directory of the prefix specified
Refactor Makefile to be cleaner
Merge pull request #108 from cmaloney/make_install

Make install
Note some more areas which aren't yet fleshed out with TODOs
Rename proto -> protocol
Properly namespace operator<<
Merge pull request #109 from cmaloney/mynde_to_merge

Mynde to merge