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

fixes #7577
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)