0.1.7 Release

Changelog:
*  LDAP auth (Close #21, close polemarch/ce#27)
*  Refactoring interface
*  Project ReadMe
*  Mass sync on projects (close vstconsulting/polemarch#36)
*  Periodic Tasks linked to Templates
*  Run executions with hosts as inventory
*  Update info in docs about production use MySQL
*  Fix bugs some bugs.

See merge request polemarch/ce!9