replace and select are insconsistent for integer and digit vector inputs

[greenflash1357]

Both methods use direct indexing for vectors of digits, i.e. index 1 is the least significant digit.
For integer input, the methods use indexing in direction of reading, i.e. index 1 is the most significant bit.

julia> select(135,[1:2])
13
julia> select(digits(135),[1:2])
2-element Array{Int64,1}:
 5
 3

This can be confusing and misleading, though different behavior for different input parameters might be ok.

Possible future action:

• leave as is
• change to consistent behavior, e.g always start indexing from least/most significant digit
• remove methods for vectors of digits