Switches use post and delete requests to make dichotomous LineItem's

[alexjamesmalcolm]

Fixes #100

[coveralls]

Pull Request Test Coverage Report for Build 554

• 0 of 0 (NaN%) changed or added relevant lines in 0 files are covered.
• 5 unchanged lines in 1 file lost coverage.
• Overall coverage increased (+0.4%) to 86.066%

---

Files with Coverage Reduction	New Missed Lines	%
/home/travis/build/NAPOSCA/pantryplus/src/main/java/org/wecancodeit/pantryplus/controllers/PantryController.java	5	78.26%
<!--	Total:	5		-->

Totals
Change from base Build 552:	0.4%
Covered Lines:	315
Relevant Lines:	366

---

💛 - Coveralls