Add `-T` -a` to the default ssh command/s.

- Disable TTY allocation
- Disable agent forwarding
Disable x and clear all forwardings by default as well.
eigs fixes: input preprocessing, eigvecs postprocessing, tests and doc

eigs: further fix and cleanup

eigs: final fixes, test and doc update

eigs: final fix?
faster SubString UTF8String
bring fieldtype typefunc closer to the actual fieldtype builtin
vec for sparse matrices & sparsevec from matrices
Two LLVM 3.5 fixes

- Add forgotten prepare call. Fixes dcjones/Gadfly.jl#368
- Remove an unused variable to silence compiler warning
Bump LLDB version and make customizable
Merge pull request #7666 from tanmaykm/spmatrix

vec for sparse matrices & sparsevec from matrices
Merge pull request #7622 from Jutho/jh/eigsfix

WIP: fixing eigs
Test names printed in a friendlier blue colour

Previously we used red, which, as mentioned in #7557, might not be
the best of choices for psychological reasons.  Instead, we now
use the blue-ish `JULCOLOR` defined in `Make.inc`.
AbstractMatrix does not have a dimension.
Replace Function->Callable in sum, prod, ...
Merge pull request #7674 from Jutho/jh/reducefix

Replace Function->Callable in sum, prod, ...
Merge branch 'master' of github.com:JuliaLang/julia
Merge pull request #7672 from carnaval/master

Bring fieldtype typefunc closer to the fieldtype builtin. Helps #7652
allow a semicolon after catch for writing 1-line try/catch blocks
clarify catch syntax in docs

fixes #7670
Merge pull request #7599 from wavexx/recommended_ssh_flags

Add `-T` -a` to the default ssh command/s.
Merge pull request #7660 from catawbasam/isvalidss

faster SubString UTF8String (worrisome diff Linux v Win)
fix #7679, comprehension binding regression