build: Disclaimer that regressions are unsupported for out-of-source builds.
build: Differentiate out-of-source builds for regressions.
build: Add out-of-source archive support.
git: Ignore additional files.
build: Bump version for next release.
build: Re-order BUILD_DIR/SRC_DIR output.
build: Prefer sed over expr for value expansion.
build: Fix typo.
build: Install ck_md.h to correct path.
ck_barrier_mcs: Style clean-up.
ck_barrier_tournament: Remove old/stale comments.

ck_pr_load is unnecessary. It is assumed a strong fence follows
initialization (through thread creation boundary, for example
or explicit IPI).
whitespace: Various style changes.
whitespace: More style fixes.
ck_rwlock: Forgot to add acquire on operation success.
ck_bytelock: Acquire semantics on read.
ck_rwlock: Improve code legibility.
ck_rwlock: Add documentation on visibility semantics.
ck_pr: moving PPC32 to RMO.

Signed-off-by: Joao Fernandes <mail@joaofernandes.eu>
git: Ignore additional files.
ck_hs: Eliminate pointless legacy branch.