Add version for maven-compiler-plugin to make maven quiet
Make Location have multiple Positions, where a sequence of Positions
tells you how you got to where you are. Position 0 will always be in the
input file.
Add location information into template expansion bits
Merge branch 'master' of github.com:cse-bristol/jasb
Tidy up a line
Merge branch 'master' of github.com:cse-bristol/jasb
Revisit locations to make them more sensible