parse: now with no position arg, returns no position arg [close #2215]

It will also throw an error in that case if it hasn't consumed the
entire string. If you need more fine-grained control, then you ought
to call it with the positional argument and check that.
vec(a): change this to mean the vectorization of the tensor a [#2214].
rename resize to sizehint, remove constructors with size hint arguments
replace grow! with resize!
closes #2217
Add documentation for new integer bit-query functions (#2159)

Conflicts:

	deps/Rmath
tiny fix
Restore Rmath subproject.

Partial revert of cfca6fe.
Merge pull request #2221 from wlbksy/patch-1

tiny fix
fix example/bigfib since bigint is now in base
Merge pull request #2224 from aviks/bigint

fix example/bigfib since bigint is now in base
zip documentation
Docs: Dict{K,V}() instead of Dict{K,V}(n)

Dict does not seem to take an initial size any more:

    julia> x = Dict{ASCIIString,Any}(10)
    ERROR: no method Dict(Int64,)




    julia> x = Dict{ASCIIString,Any}()
    Dict{ASCIIString,Any}()
Merge pull request #2227 from rened/patch-1

Docs: Dict{K,V}() instead of Dict{K,V}(n)
Merge pull request #2209 from kmsquire/unzip

zip documentation
remove special case for .^ of integer arrays. fixes #2219
Fix a broken link in packagelist.rst

Fixed the broken link to the obsoleted package DeExpr (which has been renamed to Devectorize)

It is now corrected. I also put it below DecisionTree to maintain the correct lexicographical order.
use CPU_CORES if -p has no argument. fixes #2228
update doc for indexing. fixes #2199
Merge pull request #2231 from lindahua/patch-1

Fix a broken link in packagelist.rst
Merge branch 'master' of github.com:JuliaLang/julia