Final release candidate for v1.0.0

Final release candidate before releasing the stable v1.0.0 version. New features and bugfixes (a.o.) in this release contain:

New features:

• Added French translations
• Implemented more subtle colors in design

Bug fixes:

• Fixed crash on disabled OpCache
• Fixed colors of graphs
• Positive status feedback / Affordance of red/green dots

Documentation:

• Bumped version of packagist package

Thanks to all the contributors whether by merged code, design or opening issues.