Add missing file.
Merge pull request #39 from Frank3K/style-changes-1

Style changes (code and comments)
Minor speed improvement: only compute uniqueId (at most) once.
Changed the way ID are collected. All referenced IDs are collected and mapped to uniqued IDs. Unreferenced IDs are removed in order to save space.
Add missing file.
Minor speed improvement: only compute uniqueId (at most) once.
Merge branch 'id-references' of github.com:Frank3K/grunt-svgstore into id-references
Merge pull request #40 from Frank3K/id-references

Changed the way ID are collected
Merge pull request #42 from Frank3K/master

Remove empty g elements
Bump version
Update
Small README fixes.