Adding ability to get positional operator for a document

Regenerated gemspec for version 1.2.15

Regenerated gemspec for version 1.2.14

Regenerated gemspec for version 1.2.13

Regenerated gemspec for version 1.2.12

Regenerated gemspec for version 1.2.11

Regenerated gemspec for version 1.2.10

Regenerated gemspec for version 1.2.9

Regenerated gemspec for version 1.2.8

Regenerated gemspec for version 1.2.7