update copyright year range
Merge pull request #351 from gdi2290/patch-1

update copyright year range
update copyright year range in readme
Merge pull request #352 from gdi2290/patch-1

update copyright year range in readme
don't curl if version is specified + installed

Removes CURL to match the version pattern if an explicit version (e.g. `v0.10.25`) is specified and already installed.
Merge pull request #354 from simontabor/patch-1

don't curl if version is specified + installed
Change variable name to fix zsh parse issue
Merge pull request #356 from geekjuice/master

Change variable name to fix zsh parse issue