Implement cld
Document cld
checks for sparse matrix construction with I,J,V

fixes #8225
Fix hangs and segfaults when egregiously long symbol is used.
Check nb instead of length.
Add quick explanation of how to redirect stderr.
Fix #8243 and add scalar division for Triangular
Merge pull request #8247 from danluu/manual_stderr

Add a sentence in the manual on how to redirect stderr
Add tests to catch regressions in code_native and code_llvm.
Add tests for isbits.
Add a bit more explanation.
rm unused ziggurat.c. closes #8248
fix #8252, `eval` after `workspace`
make `big` map ranges to ranges
Merge pull request #8230 from tanmaykm/fix8225

checks for sparse matrix construction with I,J,V
Add arm specific configuration to help in the port.
Makefile changes to build on ARM
Add fake cpuid for ARM

TODO: proper implementation using procinfo
arm: use LLVM3.5
Rename Make.inc.arm to ARM.inc