attachToIssue method added, takes issueNum, file path and callback
totally forgot about the require's
assign method added, includes test
Merge branch 'master' of git://github.com/andreacode/node-jira into merging

Conflicts:
	lib/jira.js
Revert "Merge branch 'master' of git://github.com/andreacode/node-jira into merging"

This reverts commit fc2806b917aa958884d5050c22c9c9fd94476e49, reversing
changes made to 701186870b6ba2726f596cf01b9d167bbfbb399d.
Merge branch 'master' of github.com:steves/node-jira
Preparing for 0.7.2 release