Merge pull request #73 from azai91/feat/db

(feat) Add clearDB request. close #71
(refactor) Makes attributes of svg elements functions
Merge pull request #74 from bethjohnson/refactor/displayFunctions

(refactor) Makes attributes of svg elements functions
(feat) Node is added on enter. Closes# 21
Merge pull request #75 from christophertrev/feat/submitEnter

(feat) Node is added on enter. Closes# 21
(bug) Clicking on text or bubble selects bubble. Closes #69
Merge pull request #77 from bethjohnson/bug/clickOnText

(bug) Clicking on text or bubble selects bubble. Closes #69
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(docs) Express now serves docs under /docs closes #76
Merge pull request #78 from christophertrev/doc/serveDocs

(docs) Express now serves docs under /docs closes #76
(feat) Add individual nodes to diagram instead of recreating diagram every time.  Closes #64
Merge pull request #79 from noodle/master

(feat) Add individual nodes to diagram instead of recreating diagram every time.  Closes #64
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(feat) add editMessage help function