Packages incompatible with your Julia version

If a package doesn't have any tagged versions compatible with your julia
version, it complains that

```julia
FixedPoint's requirements can't be satisfied because of the following fixed packages: julia
```
It seems confusing to consider julia a fixed package, so I changed the
message to.
```
ERROR: FixedPoint can't be installed because it has no versions that
support 0.4.0-dev+473 of julia
```
Fix tab completion segfault in reverse search
Fix find() when called with function and non-StridedArray

The previous code expected testfun to be vectorized, which does not match
the behavior of other methods, nor the documentation. Especially visible
when passing a sparse matrix. Always return an Array rather than an object
similar to the input, because it makes no sense to return a sparse vector.
Remove the method matching any object so that an error is raised rather
than returning incorrect results on non-AbstractArray (e.g. Set).
Import axpy! to BLAS and extend some BLAS 1 and 2 methods to work for StridedArrays
doc: varargs keywords can be mixed with non-varargs ones

And fix a variable name: k -> args.
add docs for readall(filename::String)
fix #8341, parser hang on EOF during character byte sequence
Merge pull request #8340 from sjkelly/sjk/readall_docs

add docs for readall(filename::String)
Merge pull request #8337 from rfourquet/docs-kwargs

doc: varargs keywords can be mixed with non-varargs ones
Add a link for building LLVM on ARM.
cumsum, cumprod default to dimension 1
Rename julia.plist to BBEditTextWrangler-julia.plist (#8298)
fix bounds bug in getindex(a:b, c:d) with c<1

And more laconic Julia.

Commit 646fe6b3 eliminated a non "redundant bounds check", which is here
re-introduced via `check_indexingrange` function.
Specify ::IO for writemime.
update helpdb.jl
Merge pull request #8332 from JuliaLang/anj/blas

Import axpy! to BLAS and extend some BLAS 1 and 2 methods to work for StridedArrays
Merge pull request #8315 from JuliaLang/anj/fixtab

Fix tab completion segfault in reverse search
Change argument names of contains

Now matches documentation of `contains(haystack::String, needle::String)`. This is so `methods(contains)` is more helpful.
And make sure to change the rest of the argument names....
rm INFO message from Base.init_help; addresses #8290