Patch v0.4.0

[ifilot]

Features

• Added support for visualizing frequency calculations
• Added support for visualizing nudged elastic band calculations
• Each segment has its own drop-down menu for Load / View / Select operations
• Shortcut keys are now hooked up to active widget (either editor/top or analysis/bottom window)
• Add support for PyMKMKit YAML files

Visuals

• Improving lay-out of periodic table widget
• Improving lay-out of graphs (adding labels, fixing legend)
• Using more minimalistic icons (improving visual clarity)

Bugfixes

• Fix malformed OUTCAR where adjacent negative numbers lack whitespace (e.g. "1.23-4.56")
• Fix Send to editor to update both the editor and Basic info panel