extend LOAD_PATH via environment variable
change ordering of LOAD_PATH
improved JULIA_LOAD_PATH code based on Stefans suggestions
Add some documentation
Shorten code further
Fix a few typos on windows
Windows: update download links
Incorrect link in 64e69bc
spzeros now requires both, rows and columns.

Fix #5436
when no delimiter is specified, delimiters are taken as one or more adjoining whitespaces.
fixed bug in handling empty columns.
updated tests and docs.
fixes #5391
Deprecate symmetrize! in favor of copytri!
Add pivoting to LU decomposition.
fix #5437
Improved implementation of random number generation within a range
Merge pull request #5425 from tknopp/JULIA_LOAD_PATH

Extend LOAD_PATH via environment variable
Speed up u-/l-cfirst for UTF8
Merge pull request #5427 from JuliaLang/anj/symmetrize

Deprecate symmetrize! in favor of copytri!
Merge pull request #5430 from JuliaLang/anj/lup

Add pivoting to LU decomposition.
Make u-/l-cfirst handle empty strings
Update NEWS.md with generic LU factorization

Also add cross-references.