Add initial iOS application

This is already in a working state, but is still missing a few things.
For example, there is no proper progress indication during generation
and the UI just hangs and there's no way to delete a site yet.

iOS/MainViewController.m

@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2016, Jonathan Schleifer <js@heap.zone>
+ *
+ * https://heap.zone/git/?p=scrypt-pwgen.git
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice is present in all copies.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+@import ObjFW_Bridge;
+
+#import "MainViewController.h"
+
+#import "AddSiteController.h"
+#import "ShowDetailsController.h"
+
+@implementation MainViewController
+- (void)viewDidLoad
+{
+	_siteStorage = [[SiteStorage alloc] init];
+}
+
+- (void)dealloc
+{
+	[_siteStorage release];
+	[_tableView release];
+
+	[super dealloc];
+}
+
+-  (NSInteger)tableView: (UITableView*)tableView
+  numberOfRowsInSection: (NSInteger)section
+{
+	return [self.siteStorage sitesCount];
+}
+
+- (UITableViewCell*)tableView: (UITableView*)tableView
+	cellForRowAtIndexPath: (NSIndexPath*)indexPath
+{
+	UITableViewCell *cell = [tableView
+	    dequeueReusableCellWithIdentifier: @"site"];
+
+	if (cell == nil)
+		cell = [[[UITableViewCell alloc]
+		      initWithStyle: UITableViewCellStyleDefault
+		    reuseIdentifier: @"site"] autorelease];
+
+	cell.textLabel.text = [self.siteStorage.sites[indexPath.row] NSObject];
+
+	return cell;
+}
+
+-	  (void)tableView: (UITableView*)tableView
+  didSelectRowAtIndexPath: (NSIndexPath*)indexPath
+{
+	[self performSegueWithIdentifier: @"showDetails"
+				  sender: self];
+}
+
+- (void)prepareForSegue: (UIStoryboardSegue*)segue
+		 sender: (id)sender
+{
+	if ([segue.identifier isEqual: @"addSite"] ||
+	    [segue.identifier isEqual: @"showDetails"])
+		[segue.destinationViewController setMainViewController: self];
+}
+@end