Change complex dot to use cblas to avoid problem with complex return type
recreate PCRE info after startup (lazy), to avoid depending on the libpcre version
Merge pull request #5066 from JuliaLang/jn/lazy_regex

avoid depending on the libpcre version
gc pcre regex_compile data
update packages list
Merge pull request #5291 from JuliaLang/anj/dotu

Change complex dot to use cblas to avoid problem with complex return type
fix isless and cmp/lexcmp for floating point

for now cmp() uses the total ordering, but we might change it to give a
DomainError for NaN arguments
make nextfloat/prevfloat saturate at Inf, as per the IEEE standard

ref #5290
test/euler.jl: slightly faster euler #4 algorithm
Update manual to document sinpi(x) and cospi(x)