Rename test programs so the name is a valid OCaml module name.

diff --git a/tests/01_load.ml b/tests/test_01_load.ml
similarity index 100%
rename from tests/01_load.ml
rename to tests/test_01_load.ml

diff --git a/tests/02_run.ml b/tests/test_02_run.ml
similarity index 100%
rename from tests/02_run.ml
rename to tests/test_02_run.ml

diff --git a/tests/10_match_bits.ml b/tests/test_10_match_bits.ml
similarity index 100%
rename from tests/10_match_bits.ml
rename to tests/test_10_match_bits.ml

diff --git a/tests/11_match_ints.ml b/tests/test_11_match_ints.ml
similarity index 100%
rename from tests/11_match_ints.ml
rename to tests/test_11_match_ints.ml

diff --git a/tests/15_extract_int.ml b/tests/test_15_extract_int.ml
similarity index 100%
rename from tests/15_extract_int.ml
rename to tests/test_15_extract_int.ml

diff --git a/tests/18_extract_32_64_int.ml b/tests/test_18_extract_32_64_int.ml
similarity index 100%
rename from tests/18_extract_32_64_int.ml
rename to tests/test_18_extract_32_64_int.ml

diff --git a/tests/20_varsize.ml b/tests/test_20_varsize.ml
similarity index 100%
rename from tests/20_varsize.ml
rename to tests/test_20_varsize.ml

diff --git a/tests/30_bitbuffer.ml b/tests/test_30_bitbuffer.ml
similarity index 100%
rename from tests/30_bitbuffer.ml
rename to tests/test_30_bitbuffer.ml

diff --git a/tests/31_bitstring_concat.ml b/tests/test_31_bitstring_concat.ml
similarity index 100%
rename from tests/31_bitstring_concat.ml
rename to tests/test_31_bitstring_concat.ml

diff --git a/tests/32_bitstring_compare.ml b/tests/test_32_bitstring_compare.ml
similarity index 100%
rename from tests/32_bitstring_compare.ml
rename to tests/test_32_bitstring_compare.ml

diff --git a/tests/33_substring.ml b/tests/test_33_substring.ml
similarity index 100%
rename from tests/33_substring.ml
rename to tests/test_33_substring.ml

diff --git a/tests/34_takebits.ml b/tests/test_34_takebits.ml
similarity index 100%
rename from tests/34_takebits.ml
rename to tests/test_34_takebits.ml

diff --git a/tests/35_load_from_file.ml b/tests/test_35_load_from_file.ml
similarity index 100%
rename from tests/35_load_from_file.ml
rename to tests/test_35_load_from_file.ml

diff --git a/tests/40_endianexpr.ml b/tests/test_40_endianexpr.ml
similarity index 100%
rename from tests/40_endianexpr.ml
rename to tests/test_40_endianexpr.ml

diff --git a/tests/50_named_pattern.ml b/tests/test_50_named_pattern.ml
similarity index 100%
rename from tests/50_named_pattern.ml
rename to tests/test_50_named_pattern.ml

diff --git a/tests/51_open_pattern.ml b/tests/test_51_open_pattern.ml
similarity index 100%
rename from tests/51_open_pattern.ml
rename to tests/test_51_open_pattern.ml

diff --git a/tests/60_simple_offset.ml b/tests/test_60_simple_offset.ml
similarity index 100%
rename from tests/60_simple_offset.ml
rename to tests/test_60_simple_offset.ml

diff --git a/tests/61_offset_string.ml b/tests/test_61_offset_string.ml
similarity index 100%
rename from tests/61_offset_string.ml
rename to tests/test_61_offset_string.ml

diff --git a/tests/62_offset_padding.ml b/tests/test_62_offset_padding.ml
similarity index 100%
rename from tests/62_offset_padding.ml
rename to tests/test_62_offset_padding.ml

diff --git a/tests/65_save_offset_to.ml b/tests/test_65_save_offset_to.ml
similarity index 100%
rename from tests/65_save_offset_to.ml
rename to tests/test_65_save_offset_to.ml

diff --git a/tests/70_check_and_bind.ml b/tests/test_70_check_and_bind.ml
similarity index 100%
rename from tests/70_check_and_bind.ml
rename to tests/test_70_check_and_bind.ml

diff --git a/tests/80_hexdump.ml b/tests/test_80_hexdump.ml
similarity index 100%
rename from tests/80_hexdump.ml
rename to tests/test_80_hexdump.ml