Fix sprand for very small matrices
only convert Array{T} to Ptr{T} or Ptr{Void} (fix #6073)
Revert "only convert Array{T} to Ptr{T} or Ptr{Void} (fix #6073)"

This reverts commit 97582fb0d54be66fa8d8b63a272f7ad7598b3f39.
Merge pull request #6076 from JuliaLang/anj/sparse

Fix sprand for very small matrices
base/printf.jl: the sig_dec function isn't used and can be deleted.
printf: complete support for BigInts (implemented ini_dec) [#5756]
deprecate conversion of Array{T1} to Ptr{T2} if T1 != T2 && T2 != None (fix #6073)
A more robust error bound for the determinant. Remove Float16 from linalg tests. Add fallback condition number method.
fix #6068, invalid IR for constant conditions in some cases
Merge pull request #6079 from stevengj/pointerpurity

deprecate conversion of Array{T1} to Ptr{T2} if T1 != T2 && T2 != None
make fallback hypot() behave the same for inf and nan as standard implementations
fix #6074, macroexpander bug in `let`
fix show() of 1-argument calls to binary operators

we were doing this:

```
julia> :((%)(x))
:(x)
```
use LIBUV_INC so that USE_SYSTEM_LIBUV works
Merge pull request #5902 from JuliaLang/anj/detbound

A more robust error bound for the determinant.
make ranges and arrays unequal, faster hashing of ranges, fixes #5778

fix == and isequal of ranges to only compare by components when it is safe to do so
  (ranges with different types but == components can generate different elements)

add float32(x) etc. for FloatRange

don't show floating point Range objects using colons, since those construct FloatRanges
add missing root
Merge pull request #6085 from carnaval/missingroot

add missing root
Let floatx and complexx use convert. Fix similar for sparse matrices.
missing normalisation term in ifft doc