provide the deprecated snprintf(). The mingw32 runtime does not provide the
MS-specific sprintf_s(). Mingw-w64 copes with both. So we switch to sprintf_s
but also provide it as a weak symbol so that mingw32 does not complain.

specifiers; this is required for proper static link.

works with the VS2010 runtime, too. Also reduce the stack size requirements
to avoid depending on __chkstk_ms().

ship the static library and includes too.

gone for good.

configuration entries, and update bootstrap script.

calling application.

migration.

the future.

- Ignore key events when XFilterEvent returns true
  - Do not set key to 0 when it is over 128

a lot of software (wrongly) assumes that int32_t is the same as int.

fixing this in #48.

Carlo Bramini. Addresses #48.