Material design for Kellermeister: release 1.26 uploaded to Playstore

This release contains support for Material Design and API 23: although it may sound like a small change this is by far the largest change in the app since two years. Please report any issues and I'll be happy to fix them...

1.26: Maintenance release "Marshmallow"

- Features:

• adaption of Material Design (no more missing menu button issues)

- Bugfixes:

• select image from gallery doesn't work for API >= 11 (thx to Rick for issue report)

- Enhancements:

• sliding between tabs enabled

- Changes:

• removed product lookup (until we find a free-of-charge service for this)

Have fun!

This release contains support for dutch language and two bugfixes. 

1.25.3: Maintenance release "Oranje"

- Features:

• NL translation (kudos to Bart)

- Bugfixes:

• CSV-files having a leading UTF-8 BOM are not imported
• numbers changed in NumberPickers are not saved when directly pushing the save button (kudos to Rick)

- Enhancements:

• none

- Changes:

• none

Have fun!