Add the api package to interact with a server

[noahingh]

#313

funcmain() {
ctx:=context.Background()
ts:=oauth2.StaticTokenSource(
&oauth2.Token{AccessToken: "... your access token ..."},
)
tc:=oauth2.NewClient(ctx, ts)
c:=api.NewClient("https://cloud.gitploy.io/", tc)
ds, _:=c.Search.ListDeployments(ctx, ...)
}