Version 1.6.0

• Improve multilingual support (#915, #918, #943, #950)
• Ensure XML schema compliance (#914, #926)
• Improve extract speed (#965)
• Additional options for sorting and grouping (#925, #931, #948, #979)
• Additional options for xml2pdf integration (#905, #938)
• Add PDF archive functionality (#982)
• Make WMS usage in print more flexible (#986)
• Bug fixes and debugging possibilities improvement (#910, #909, #897, #894, #916, #919, #870, #908, #932, #955, #958, #963, #970)