Removal of unnecessary duplicated implementation in several package.mo

Release 1.1.2 (#41)

* Removing duplicate implementations in several package.mo files  (#40)

* removing duplicate implementations in package.mo

* remove duplicate implementations in package.mo

* removing duplicate implementations from package.mo

* remove duplicate implementation from package.mo

* release 1.1.2

* release notes V1.1.2

bug removal and minor improvements

• an extra extend statements that may cause error was removed and few minor improvements

graphical annotations into separate icons

• Graphical annotations into separate icons
• Improved implementation of Units package
• UsersGuide package added

Converted to MSL 4.0.0

The MSL 4.0.0 conversion script was applied.

Components in separate *.mo files

This release is easier for incremental development. All major components are in separate *.mo files. Annotations changed to MSL 3.2.3