Initial version of Frequency Spectrum DDG goodie.
Updating code URL.
Improve handling of fractional frequencies
Improve handling of fractional frequencies
Replace magic numbers with constants, disallow consecutive dots in queries, and give radio spectrum examples.
Merge remote-tracking branch 'upstream/master'
Optimize variables and subroutines by tweaking their declarations.
Merge remote-tracking branch 'upstream/master'

Merge latest dev branch containing optimizations of variable declarations.
Adding function comments.
Merge pull request #252 from hollingsworthd/master

Frequency Spectrum