Release v0.5.5

Changes in this Release
fc94691 Merge pull request #38 from discipl/projectview-flintview
16055c5 Added mirror for itemis
2d49f3c Changed from ubuntu 16.04 to 20.04
87cf80d Upgraded dependencies to conform with audit
d3bc7e5 Removed unnecessary language references
95ce6aa Added standaloneplugins to ide build
e8ead1b Created basic projectview 'FlintView', not integrated in FlintPlugin yet
f57b638 Tagging (#32)
a8e41a6 Added plugin updated docs
e478442 Removed duplicate code
8f2eb26 Fixed failing test
5a780a8 Fixed highlighting issue
439deec Added docs on tagging
b145c3a Made json import more testable
00db370 Added group untag and group untag test
fe6281d Added test for group tag
774bfe9 Added test for singletag and singleuntag
27486b0 Added tag imports to model parser
7250e5e Added square cell and switched to textpart for modelparser
a7e1364 Added factreference references and added tagging to facts and duties
227b730 Added basics for tagging
e128e50 Tagging