Merge pull request #75 in ASAPO/asapo from manylinux2010 to develop

* commit '4b90321d':
  update dockerfiles, fix bug
  switch to cmake 3.7+, update build_env docker images
  fix windows test
  increase timeout for callback test
  fix valgrind errors
  get rid of using python2/python3 explicitly
  Create a manylinux2010 build environment docker image
  Specify numpy version for building manylinux wheels
  Make building event monitor producer optional
  Make python version a cmake variable
  Use statically compiled libcurl