Adding: Servlet for handling requests on workspace template form, client POJOs, further fleshed out web service

[zcmarcus]

This branch adds FormLoadAction servlet for handling requests for workspace template form and loading retrieved web service data. Implementation of servlet logic required:

• Modification of database: in Template entity, removed column "primaryOwnerProfile" (nested escaped JSON String), and broke out those attributes into separate columns: "ownerFirstName", "ownerLastName", "ownerDisplayName", "ownerEmail". This change was made to drastically simplify CRUD operations on Templates and allow for additional queries on these sub-properties.
• Creation of newly defined web service resource and @GET operation getTemplates in TemplateService class. This operation retrieves all templates for a given userID passed in as param, converts List of templates to JSON object, and sends as response.
• Creation of TemplatesResponseDao on client to call web service resource, retrieve response, map response to POJO, and return retreived TemplatesCollection (found in com.slack2slack.consume package).
• Moving "Choose Template" portion from configureWorkspace.jsp to new chooseTemplate.jsp. Flow now goes as follows: From index, logged in user clicks menu link "Slack Workspace Template Form" -> chooses template -> clicks configure template -> arrives at configureWorkspace.jsp

[zcmarcus]

Note: Because there is a lot in this feature, and because we discussed all of this in a meeting, I will go ahead and handle this myself.