Introduce generic functions for nested arrays in docs

Author: oschulz

docs/src/index.md

@@ -2,6 +2,9 @@
 
 A Julia package for efficient storage and handling of nested arrays. ArraysOfArrays provides two different types of nested arrays: [`ArrayOfSimilarArrays`](@ref section_ArrayOfSimilarArrays) and [`VectorOfArrays`](@ref section_VectorOfArrays).
 
+This package also exports the following new functions that are applicable to nested arrays in general:
+[`flatview`](@ref), [`nestedview`](@ref), [`innersize`](@ref), [`deepgetindex`](@ref), [`deepsetindex!`](@ref), [`deepview`](@ref), [`deepmap`](@ref) and [`nestedmap2`](@ref).
+
 
 ## [ArrayOfSimilarArrays](@id section_ArrayOfSimilarArrays)