Executable file names are updated

Author: sbellware

message-db.gemspec

@@ -11,6 +11,6 @@ Gem::Specification.new do |s|
  s.licenses = ['MIT']
 
  s.files = Dir.glob('{database}/**/*')
- s.executables = Dir.glob('scripts/evt-*').map(&File.method(:basename))
+ s.executables = Dir.glob('scripts/mdb-*').map(&File.method(:basename))
  s.bindir = 'scripts'
 end