Add examples to the automated testing in travis. Make err-on-fail optional on both examples (disabled during ci)

examples/temp_sensor/rakefile.rb

@@ -7,6 +7,11 @@ require './rakefile_helper'
 
 include RakefileHelpers
 
+REQUIRED_DIRS = [ './build', './build/mocks' ]
+REQUIRED_DIRS.each do |v|
+  directory v
+end
+
 # Load default configuration, for now
 DEFAULT_CONFIG_FILE = 'gcc.yml'
 configure_toolchain(DEFAULT_CONFIG_FILE)
@@ -22,7 +27,7 @@ end
 
 desc "Build and test Unity"
 task :all => [:clean, :unit, :summary]
-task :default => [:clobber, :all]
+task :default => REQUIRED_DIRS + [:clobber, :all]
 task :ci => [:default]
 task :cruise => [:default]
 
@@ -30,3 +35,8 @@ desc "Load configuration"
 task :config, :config_file do |t, args|
   configure_toolchain(args[:config_file])
 end
+
+desc "Return error on Failures"
+task :strict do
+  $return_error_on_failures = true
+end