Docu: Added changelog + changes for v1.0.1

CHANGELOG.md

@@ -0,0 +1,15 @@
+# kiutils - CHANGELOG
+
+## v1.0.1 - 15.06.2022
+- Added: Dimension, DimensionStyle, DimensionFormat classes for dimensions (measurements in PCB)
+- Added: Target class for board target markers
+- Added: Support for dimensions and target markers in Board class
+- Added: Prerequisites in docu
+- Fixed: Correct parsing of footprints with empty `attr` field (see #2)
+- Fixed: Quoted strings funcion now handles integers that may be parsed from older KiCad versions 
+         correctly (see #3)
+- Fixed: Symbol pin's `alternate` field was missing and is now parsed correctly (see #4)
+- Fixed: Footprint `libraryLink` attribute was missing (see #5)
+
+## v1.0.0 - 19.03.2022
+- Initial version