[#153] fix payment validation - amount >= 0, and tests
Added more tests for shooter

[#186]
[#183] Refactor controller tests to use shared examples.
Merge pull request #110 from gotar/153-fix-payment-validation

[#153] fix payment validation - amount >= 0, and tests
Merge pull request #113 from gotar/183-controller-tests-shared-examples

[#183] Refactor controller tests to use shared examples.
Merge pull request #111 from gotar/186-more-shootercontroller-tests

Added more tests for shooter
192-Fix-Spec-Directories
Merge pull request #114 from gotar/192-Fix-Spec-Directories

192-Fix-Spec-Directories
[#163] Allow new competitors to be added to contest
Merge pull request #115 from gotar/163-contests-edit-view

[#163] Allow new competitors to be added to contest
[#187] - Added sorting to shooters view