Use nweunit
Add tests for `read_array' and `write_array'
Add `check_bound' macro
Change arguments ordering of `ALL_OF' macro
Use OUTPUT_UNIT for test messages
Add `sac_lib'

Tests for body should be added
Improve grepability
Rename: w1 -> wHead, w2 -> wBody or wIo
Delete useless `lib_reflectable'
Merge branch 'fb/delete_unused_features' into fb/sac
Declare `intrinsic' and `non_intrinsic' explicitly
Delete `TESTABLE_*' and add `errortesting' rake task

Passing isRaised through nested routines is too painful to code.
Now, error tests are performed by checking exit status through shell.
I will create an error test code generator when workflow is established.
Add `sac_lib_errortest.rb'
Whitespaces
Split 'sac_lib_errortest.rb' into general part and test codes
Use `errortest_generate.rb'
Use Makefile instead of Rakefile
Whitespaces
Merge branch 'fb/errortest' into fb/delete_TESTABLE_RAISE
Rename `read' -> `read_sac' and `write' -> `write_sac'