New function Divide

I thought this is a nice function and implemented it.
Added comments

I forgot to add comments last time
[Finished] New Mod-Function

Introduces modulo-operator, an operation which gives back the rest of a
division.
New Function Multiply

Added a new function to multiply values. Customer A asked for this and
management already sold.
Fixed Serial-Warning
New function Divide

I thought this is a nice function and implemented it.
New Function Multiply

Added a new function to multiply values. Customer A asked for this and
management already sold.
Merge branch 'AnotherStupidFunction'

Conflicts:
	org.eclipse.example.calc/src/org/eclipse/example/calc/internal/Calculator.java
Merge branch 'DivideFunction'

Conflicts:
	org.eclipse.example.calc/src/org/eclipse/example/calc/internal/Calculator.java
	org.eclipse.example.calc/src/org/eclipse/example/calc/internal/operations/Divide.java
Merge commit '7ca1f0d308bcce9b31b741d446f9279ea36cd3ef'

Conflicts:
	org.eclipse.example.calc/src/org/eclipse/example/calc/internal/Calculator.java
Fixed Serial-Warning
Merge branch 'master' into newMaster
Fixed a merge-bug