cleaned up TODOs

src/main/java/gov/usgs/earthquake/nshmp/DisaggCalc.java

src/main/java/gov/usgs/earthquake/nshmp/RateCalc.java

src/main/java/gov/usgs/earthquake/nshmp/site/NshmpSite.java

...n/java/gov/usgs/earthquake/nshmp/site/NshmpSiteFiles.java

src/main/java/gov/usgs/earthquake/nshmp/www/ServletUtil.java

...a/gov/usgs/earthquake/nshmp/www/hazard/HazardService.java

...a/gov/usgs/earthquake/nshmp/www/services/RateService.java

...ov/usgs/earthquake/nshmp/www/services/SourceServices.java