Added Test Cases for CE1 and fixed some bugs.

Fixed some bugs related to the add function.. Now it will not add
strings that consists of only whitespaces.
Refined LogicAddTC1 and added LogicDeleteTC1

Refer to changelog.
Added Test Cases for CE1 Delete and Clear

Refer to changelog.
Added LogicSaveTC1

This tests saving functionality.
Fixed LogicSaveTC1 comments.

It said delete() before, now it says save().