fix dependencies for ocaml < 4.02 (windows)
build and run date example with appveyor
Merge pull request #202 from fdopen/windows-fixes

Windows related fixes
Fix warning: format ‘%p’ expects argument of type ‘void *’, but argument 5 has type ‘int *’
Fix warning: ISO C does not allow extra ‘;’ outside of a function
s/uint64/uint64_t/
Fix warning: format ‘%ld’ expects argument of type ‘long int’, but argument 4 has type ‘int64’
Merge pull request #203 from yallop/pedantic-warnings

Fix warnings that show up with the -pedantic flag
Send AppVeyor test output to the console.
Merge pull request #205 from yallop/appveyor-test-verbosity

Send AppVeyor test output to the console.
Obtain struct layout by generating a C program.
Tests for retrieving struct layout from C.
Test retrieving union layout from C.