move mapistore_namedprops_get_ldif_path implementation out from the header to mapistore_namedprops.c
initial sketch namedprops mysql backend

99% Not implemented
start and commit trasaction
add named properties sql schema to makefile install section
add "IF NOT EXISTS" on create table statement
namedprops mysql init almost done
new test directory with unittest of openchange code

  * Now it only has unittest for namedprops_mysql.c from libmapistore
  * It uses check framework and cmake for building.
  * It requires to have openchange already installed locally