SkillsFragment base functionality added

1) fragment_skills.xml layout added - holds the list view that contains
all of the skills
2) list_row_skill.xml layout added - contains the UI for a single list
view row
3) SkillsAdapter added - manages the skills list view
4) SkillsPersister added - manages http requests to the server
5) SkillModel added - contains two fields (id and name of a skill)
6) fragment_profile Renamed to fragment_about