checks for sparse matrix construction with I,J,V

fixes #8225
require sphinx < 1.2 to build helpdb.jl

The jlhelp.py code needs to be updated to work with sphinx 1.2,
to stop adding extra newlines.

Closes #7754.
Add quick explanation of how to redirect stderr.
Merge pull request #8247 from danluu/manual_stderr

Add a sentence in the manual on how to redirect stderr
rm unused ziggurat.c. closes #8248
fix #8252, `eval` after `workspace`
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
Add checksums for llvm 3.5.0