Add autoreconf warnings. Replace obsolete AC_TRY_COMPILE.
Remove redundant checks (already done by LT_INIT).
Remove INCLUDES. Obsolete, appears unused anyway.
Use same build template as bitcoin. Add bitcoin_secp.m4.
Merge pull request #96

6fac238 Use same build template as bitcoin. Add bitcoin_secp.m4. (kiwigb)
f9aac5b Remove INCLUDES. Obsolete, appears unused anyway. (kiwigb)
db72c18 Add autoreconf warnings. Replace obsolete AC_TRY_COMPILE. Remove redundant checks (already done by LT_INIT). (kiwigb)