Added "displace.py" which replaces genPOSCAR.py and genCG.py.
The script now support Quantum-ESPRESSO.
Added a new script "extract.py" which now replaces extTAPP.py and extVASP.py.
"extract.py" also supports the Quantum-ESPRESSO package.
Merge branch 'feature/v.0.9.2_QuantumEspresso' into develop