Pyslvs v18.09.1

Features

• Fix "Save as" error on Qt slot.
• New YAML-based file format:
  • Suffix: .pyslvs.yml
  • New text-based format to support version control.

Development

• Module of important widgets are be moved to __init__.py.
• Fix compiler option error caused by Python (cygwinccompiler.py).
• Adjust all functions and "private" methods name with PEP 8.
• New deploy options of Github releases.