added indmax,indmin,findmax,findmin for sparse matrices.

fixes #7577
Update banner, since we no longer show a list of help topics.
Add apropos() that defaults to showing what help() shows.
rename stringpatch to stringreplace

to avoid requiring admin rights in win32, see
https://cygwin.com/ml/cygwin/2014-03/msg00191.html
Merge pull request #7746 from tkelman/rename-stringpatch

rename stringpatch to stringreplace
prevent merging of type error code from different locations. fixes #7372
improve keyword argument syntax error. fixes #7743
Add sinpi and cospi to vectorized functions

sinpi and cospi were missing from the list of built-in vectorized functions. I have added them next to sin and cos respectively in the doc.
Merge pull request #7750 from gajjanag/patch-2

Add sinpi and cospi to vectorized functions
Merge pull request #7578 from tanmaykm/tanmaykm

added indmax and indmin for sparse matrices.
Revert "added indmax and indmin for sparse matrices."
Merge pull request #7751 from JuliaLang/revert-7578-tanmaykm

Revert "added indmax and indmin for sparse matrices."
Use NTFS junctions to share/julia/base etc instead of Cygwin symlinks
Merge pull request #7752 from tkelman/cygwin-buildfix

Use NTFS junctions to share/julia/base etc instead of Cygwin symlinks
nano is 10^9 (profiling, fix #7720)
One more profile timer fix
Remove recommendation to use Mac-HPC compilers

They cause no end of trouble, e.g. #6244