Merge pull request mtex-toolbox#285 from ralfHielscher/develop

merge MTEX 4.5.2 from develop

Merge pull request mtex-toolbox#264 from ralfHielscher/develop

Merge Changes for MTEX 4.5.1

Merge pull request mtex-toolbox#242 from ralfHielscher/master

MTEX 4.5

Merge pull request mtex-toolbox#227 from ralfHielscher/master

MTEX 4.4.0

Merge pull request mtex-toolbox#216 from ralfHielscher/master

mtex-4.4

Merge pull request mtex-toolbox#189 from ralfHielscher/master

mtex 4.3.2

Merge pull request mtex-toolbox#165 from ralfHielscher/master

mtex 4.3.1

Merge pull request mtex-toolbox#161 from ralfHielscher/master

mtex 4.3.0

Merge pull request mtex-toolbox#129 from ralfHielscher/master

MTEX 4.2.1

Merge pull request mtex-toolbox#128 from ralfHielscher/master

MTEX 4.2.0