Add iMakeLine component for aggregating points into linestrings and the iAggGeomOut component used by this component to actually do this.  Code copied from SDI's sAggGeomOut component and modified to provide IMOS specific aggreagtions.
switch to using LinearGeometryBuilder for creating linestrings and correct help text for component
Merge pull request #8 from aodn/iMakeLine

I make line