Clean up BoundingBox API
Clean up BoundingBox API

Remove weird atavism, improve documentation

dschwen/libmesh,hrittich/libmesh,giorgiobornia/libmesh,svallaghe/libmesh,90jrong/libmesh,balborian/libmesh,dschwen/libmesh,vikramvgarg/libmesh,capitalaslash/libmesh,BalticPinguin/libmesh,capitalaslash/libmesh,jwpeterson/libmesh,BalticPinguin/libmesh,libMesh/libmesh,hrittich/libmesh,libMesh/libmesh,90jrong/libmesh,benkirk/libmesh,jwpeterson/libmesh,libMesh/libmesh,90jrong/libmesh,giorgiobornia/libmesh,90jrong/libmesh,vikramvgarg/libmesh,dschwen/libmesh,libMesh/libmesh,hrittich/libmesh,roystgnr/libmesh,svallaghe/libmesh,BalticPinguin/libmesh,capitalaslash/libmesh,balborian/libmesh,benkirk/libmesh,balborian/libmesh,BalticPinguin/libmesh,giorgiobornia/libmesh,90jrong/libmesh,pbauman/libmesh,pbauman/libmesh,roystgnr/libmesh,roystgnr/libmesh,hrittich/libmesh,pbauman/libmesh,capitalaslash/libmesh,jwpeterson/libmesh,balborian/libmesh,hrittich/libmesh,roystgnr/libmesh,vikramvgarg/libmesh,benkirk/libmesh,90jrong/libmesh,vikramvgarg/libmesh,pbauman/libmesh,benkirk/libmesh,svallaghe/libmesh,balborian/libmesh,pbauman/libmesh,BalticPinguin/libmesh,giorgiobornia/libmesh,hrittich/libmesh,jwpeterson/libmesh,vikramvgarg/libmesh,roystgnr/libmesh,dschwen/libmesh,benkirk/libmesh,pbauman/libmesh,svallaghe/libmesh,svallaghe/libmesh,BalticPinguin/libmesh,pbauman/libmesh,svallaghe/libmesh,dschwen/libmesh,roystgnr/libmesh,balborian/libmesh,jwpeterson/libmesh,giorgiobornia/libmesh,libMesh/libmesh,vikramvgarg/libmesh,roystgnr/libmesh,libMesh/libmesh,libMesh/libmesh,giorgiobornia/libmesh,90jrong/libmesh,vikramvgarg/libmesh,benkirk/libmesh,pbauman/libmesh,svallaghe/libmesh,giorgiobornia/libmesh,giorgiobornia/libmesh,BalticPinguin/libmesh,capitalaslash/libmesh,capitalaslash/libmesh,jwpeterson/libmesh,balborian/libmesh,capitalaslash/libmesh,vikramvgarg/libmesh,90jrong/libmesh,giorgiobornia/libmesh,balborian/libmesh,dschwen/libmesh,dschwen/libmesh,svallaghe/libmesh,hrittich/libmesh,libMesh/libmesh,dschwen/libmesh,jwpeterson/libmesh,roystgnr/libmesh,90jrong/libmesh,benkirk/libmesh,balborian/libmesh,jwpeterson/libmesh,benkirk/libmesh,capitalaslash/libmesh,vikramvgarg/libmesh,BalticPinguin/libmesh,svallaghe/libmesh,hrittich/libmesh,balborian/libmesh,pbauman/libmesh,hrittich/libmesh,benkirk/libmesh