Allow PECL packages to be built.
Development mode for horde_lz4-1.0.0beta2
[mms] Add horde_lz4 compression driver.
Tweaks to LZ4 driver

More robust header checking - eliminates the need to explicitly pass
decompression size to horde_lz4_uncompress()

Remove maxsize option to horde_lz4_uncompress() - substr() can do this
for us already.

Remove 'prefix' option to horde_lz4_compress().

Be silent when encountering decompression errors - calling code can
explicitly check for this via the boolean false return.
Released horde_lz4-1.0.0beta2
Development mode for horde_lz4-1.0.0beta3