Merge branch 'feature-string-creater' into develop

...nikoblenz/fgbks/base/utils/boundary/AbstractBoundary.java

...nz/fgbks/base/utils/boundary/AbstractGrowingBoundary.java

.../base/utils/boundary/bicreater/BiCreaterStringAppend.java

...base/utils/boundary/bicreater/BiCreaterStringBetween.java

...base/utils/boundary/bicreater/BiCreaterStringCombine.java

...utils/boundary/bicreater/BiCreaterStringIntersection.java

.../utils/boundary/bicreater/BiCreaterStringLowerBounds.java

.../utils/boundary/bicreater/BiCreaterStringUpperBounds.java

...fgbks/base/utils/boundary/creater/CreaterStringLower.java

...fgbks/base/utils/boundary/creater/CreaterStringUpper.java

...oblenz/fgbks/base/utils/boundary/impl/StringBoundary.java

.../utils/boundary/bicreater/BiCreaterStringCombineTest.java

...s/base/utils/boundary/creater/CreaterStringLowerTest.java

...nz/fgbks/base/utils/boundary/impl/StringBoundaryTest.java