Changing default number of series terms from 1 to 5

Doc/Sd1/loop.xml

...h/V1/src/main/java/de/hdm_stuttgart/de/sd1/math/Math.java

...h/V2/src/main/java/de/hdm_stuttgart/de/sd1/math/Math.java

...h/V3/src/main/java/de/hdm_stuttgart/de/sd1/math/Math.java

...h/V4/src/main/java/de/hdm_stuttgart/de/sd1/math/Math.java