Document ccall calling convention specifiers
Speed up convolution. Pad vectors such that the length is product of small primes and use rfft for real convolution. Rename dct tests to dsp and add convolution tests.
Merge pull request #2865 from ihnorton/master

Document calling conventions for ccall
separate indirect calls and calling convention sections
Merge pull request #2866 from JuliaLang/anj/conv

Speed up convolution.
add complex-valued tests: sqrt
run complex test
add tests for log, sinh, cosh
add exp and tanh tests, fails for invalid flags
some inverse trig functions
fix 0^0 definitions
remaining trig/inverse trig functions
Merge pull request #2845 from simonbyrne/complextest

RFC: add complex-valued tests
Add emacs mode usage
Merge pull request #2876 from danluu/emacs_usage

Add emacs mode usage
missing closing parantheses
Merge pull request #2878 from simonbyrne/master

missing closing parantheses in test/complex.jl
filter: add methods for generic filtering with regexes.
Try to find modules in PACKAGE.jl as well

This change adds a case to `find_in_path` that attempts to find
directories appended with ".jl" as well.

The trend seems to be naming package repositories as PACKAGE.jl, but you
then had to clone packages to a local directory stripped of the ".jl" so
that files could be found.

No more!
add detach() option to Cmd, fixes #1960
also fix #2846