(#29) Don't system exit in Auth class

This commit cleans up the Auth class so that it no longer system exits
if an error occurs. Instead it will return nil if it could not properly
make the request, and it's on the consumer of the class to handle
error cases.

lib/vmfloaty/auth.rb

@@ -12,16 +12,15 @@ class Auth
     if res_body["ok"]
       return res_body["token"]
     else
-      STDERR.puts "There was a problem with your request:"
-      puts res_body
-      exit 1
+      STDERR.puts "There was a problem with your request:\n#{res_body}"
+      return nil
     end
   end
 
   def self.delete_token(verbose, url, user, password, token)
     if token.nil?
       STDERR.puts 'You did not provide a token'
-      exit 1
+      return nil
     end
 
     conn = Http.get_conn_with_auth(verbose, url, user, password)
@@ -31,16 +30,15 @@ class Auth
     if res_body["ok"]
       return res_body
     else
-      STDERR.puts "There was a problem with your request:"
-      puts res_body
-      exit 1
+      STDERR.puts "There was a problem with your request:\n#{res_body}"
+      return nil
     end
   end
 
   def self.token_status(verbose, url, token)
     if token.nil?
       STDERR.puts 'You did not provide a token'
-      exit 1
+      return nil
     end
 
     conn = Http.get_conn(verbose, url)
@@ -51,9 +49,8 @@ class Auth
     if res_body["ok"]
       return res_body
     else
-      STDERR.puts "There was a problem with your request:"
-      puts res_body
-      exit 1
+      STDERR.puts "There was a problem with your request:\n#{res_body}"
+      return nil
     end
   end
 end

lib/vmfloaty/version.rb

@@ -1,6 +1,6 @@
 
 class Version
-  @version = '0.6.0'
+  @version = '0.6.1'
 
   def self.get
     @version