Prevent first-run ./autogen.sh error due to ltmain.sh absence.
Merge pull request #204 from pmienk/master

Isolates auxiliary files generated via autogen.sh/autoreconf.
Check that -D_FORTIFY_SOURCE=2 doesn't trigger a compiler bug
Merge branch 'master' of github.com:jedisct1/libsodium

* 'master' of github.com:jedisct1/libsodium:
  Prevent first-run ./autogen.sh error due to ltmain.sh absence.
+ Loic Maury for Dylium
curve25519-donna-c64: don't read an extra byte when expanding a 32-byte number into polynomial form
Reported by Michael Holmwood.
C++ compat
curve25519-donna-c64: replace U8TO64/U64TO8 with load_limb/store_limb
To match the current @agl code.
curve25519-donna-c64: use limb instead of uint64_t everywhere for consistency