Alpha Pre-Release v1.9.0

Important (this release is an experimental one, we removed some dependencies and compile the libfakechroot against glibc 2.12 in centos 6.10 for better compatibility, but might cause some unexpected issues)

From version v.1.9.0, LPMX changes a lot on its implementation, such as removing its dependency of Memcached, which means it won't use Memcache as the info exchanger any longer, but using pure file instead, which will reduce the dependency complexity of LPMX.

From the end user's perspective, please do not upgrade for now until the release becomes more stable and passes more tests.
For the old version (<1.9.0), I will continue providing support.