Rephrase Astro Tools collection. Also Sesame URL.
e.g. X, Y, etc  -> e.g. X or Y
Tool service
Show Taverna Workbench and Astro tools services
Service Template Tool service -> Tool service
Merge branch 'master' into astrotools

Conflicts:
	AstroTaverna.A&A.pdf
	AstroTaverna.A&A.tex
workflow snippets can be seen as workflow components

and importantly, they can be combined to form a bigge workflow
Merge pull request #2 from stain/astrotools

Astrotools clarification.
Accepted
Merge pull request #4 from stain/workflow-components

workflow snippets can be seen as workflow components