metomi/rose#19: implement
metomi/rose#19: fix
metomi/rose#19: update
metomi/rose#19: test suite
metomi/rose#19: test suite and fixes
metomi/rose#19: more tests
metomi/rose#19: pass test suite
metomi/rose#19: rose edit support
metomi/rose#19: rose edit further info display
metomi/rose#19: fix test typos
metomi/rose#19: move Python out of tests
metomi/rose#49: fix save blank variable
metomi/rose#49: update
metomi/rose#19: update
metomi/rose#19: condense error strings
rose task-env --path=[NAME=]GLOB

Support --path=[NAME=]GLOB option in both "rose task-env" and "rose
task-run". New "NAME=" syntax to prepend to named PATH-like environment
variables. NAME is PATH by default.
rose task-env --path=[NAME=]GLOB: syntax fixes.

Syntax fixes after initial testing.
rose task-run: add tests.
rose task-run: now tested with no configuration.
Merge branch 'master' into rose-task-env--path