resolve build warnings under clang
Remove SQLCIPHER_CRYPTO_OPENSSL flag for commoncrypto
add function to return current registered provider
Merge branch 'prerelease' of github.com:sqlcipher/sqlcipher into prerelease
Adding 'none' option to --with-crypto-lib

This allows for skipping of the library check, useful when only
preparing the amalgamation.
remove unused array allocation
Merge branch 'prerelease' of github.com:sqlcipher/sqlcipher into prerelease
reflect SQLCipher name on startup
set reported SQLite version back to 3.7.17
Merge branch 'prerelease'
fix build warnings under VS
Merge branch 'prerelease'
improve initialization and thread safety for default crypto provider
mutex around RAND_bytes()
allow -DSQLCIPHER_OPENSSL_NO_MUTEX_RAND to disable openssl rand mutex
Update README
bump cipher_version to 2.2.1
Merge branch 'prerelease' of github.com:sqlcipher/sqlcipher into prerelease
Merge branch 'prerelease'
Merge branch 'master' into ditto