CLT.installed?: base result on version detection

CLT.installed? previously returned false if the user had outdated dev
tools installed after a 10.9 upgrade, which was confusing to users.
pastebinit: fixup etc location.

Use where we installed `pastebin.d` instead of the location provided in
the script. This shouldn't affect most users.

Closes #27887.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
Put tempfile into binmode before writing
Fall back to Process.gid if we aren't a member of the file's group
cspice 64: new formula

JPL SPICE Toolkit for C
updating cspice.rb with recommendations

Using explicit arguments instead of wildcards
Cleaning up syntax

Removing Dir []'s and using ln_s
making recommended changes

to clean up syntax and not making absolute symlinks
Making change to share.install and symlink

per recommendations
cspice: add 64 bottle.