Work around errors in multithreaded dtrmv

Limit MAX_CPU to 1024 for now

Explicitly link against libm on Android with cmake as well

Patch from #1384

Some Linux distributions (notably SuSE) have raised CPU_SETSIZE to 4096, apparently disregarding API limitations.
From #1348, the highest value to survive array initialization (on a desktop system) is 3232, and 1024 - which is the 
more usual CPU_SETSIZE limit, was demonstrated to work fine on an actual bignuma system.

as a (hopefully temporary) workaround for #1332

as a (hopefully temporary) workaround for #1332

Fix compiler warnings in ctest

Various fixes for const correctness, stray tab characters and unused labels

Work around compiler warnings for unused variables

Correct zgeadd_k prototype

* Prefix make with travis_wait to prevent it getting killed for producing no output

* Extend travis_wait to 30mins for the windows build

* Trying 45 mins wait time

* Increase travis_wait time to 45 minutes for linux builds as well

Allow overriding NUM_THREADS in cmake

[appveyor] fix test directory

[appveyor] Use out-of-tree build and cache

README: Use the SVG Travis badge

Add trivially optimized DSDOT for POWER8

Add optimized dsdot to all other x86_64 kernels that use sdot.c

Eliminate warnings

Update LAPACK to 3.8.0

[appveyor] use cmake from conda forge

Handle shmem init failures in cpu affinity setup code

Failures to obtain or attach shared memory segments would lead to an exit without explanation of the exact cause.
This change introduces a more verbose error message and tries to make the code continue without setting cpu affinity.
Fixes #1351

Eliminate mode variable where not needed in syrk interface