evtone: Release 1.1

evtone: Use sig_atomic_t for got_signal ...

Strictly speaking, 'volatile int' is not guaranteed for atomic writes by
the C standard. However glibc says in practice 'volatile int' should be
fine. Fix it either way.

README.md: Create

.clang-format: Create

meson.build: Set C warnings and standard

meson.build: Create

Initial commit