use our own version of strdup/strndup; close #28
Change Travis' test script to `make test`; close #45

merged a patch from @nicolasmccurdy.
"=" should be a token; fix #51
check syntax for all command-line argument files
command exec status should be properly updated according to syntax check results
test should check all files in the example directory
should skip comment lines
add a few more examples with explaining comments
Fix comments in 03fizzbuzz.strm.
Merge pull request #54 from suzukaze/fix-comments

Fix comments in 03fizzbuzz.strm.
rename example -> examples
add emit example
add skip example
add echo server example
comment skip should not just ignore whole comments, but should convert them to newslines
add chat server example
lex.l {TRAIL} should ignore comments as well
take script input from stdin if no command-line argument is given
print "stdin" as a file name when script comes from stdin
Remove compilation warnings