Re-use objects created by getData(): 50% speedup in expression evalua…

…tion

Prepare for 0.1.5 release

Prepare for v0.1.4 release

Update package.json for new version

Uploads must use fork URL, resolves mavoweb#235

Attempt to fix mavoweb#215

don't read me

Bring contribution guidelines up to date

Implemented concatenate operator (&) and function (concatenate())

This is important because + only adds numbers, so we did not have a way
to concatenate before. Operator inspired from Ada. How it works: array
& string will join the array, array & array concatenates element-wise,
string & string will concat the strings.

Add CNAME