fixes #153: added podspec for direct CocoaPods use

+Pod::Spec.new do |m|
+
+  m.name    = 'MapBox'
+  m.version = '0.5.0'
+
+  m.summary     = 'Open source alternative to MapKit.'
+  m.description = 'Open source alternative to MapKit supporting custom tile sources, offline use, and complete cache control.'
+  m.homepage    = 'http://mapbox.com/mobile'
+  m.license     = 'BSD'
+  m.author      = { 'Justin R. Miller' => 'justin@mapbox.com' }
+
+  m.source = { :git => 'https://github.com/mapbox/mapbox-ios-sdk.git' }
+
+  m.platform = :ios, '5.0'
+
+  m.source_files = 'Proj4/*.h', 'MapView/Map/*.{h,c,m}'
+
+  m.prefix_header_file = 'MapView/MapView_Prefix.pch'
+
+  def m.post_install(target_installer)
+    puts "\nGenerating MapBox resources bundle\n".yellow if config.verbose?
+    Dir.chdir File.join(config.project_pods_root, 'MapBox') do
+      command = "xcodebuild -project MapView/MapView.xcodeproj -target Resources CONFIGURATION_BUILD_DIR=../../Resources"
+      command << " 2>&1 > /dev/null" unless config.verbose?
+      unless system(command)
+        raise ::Pod::Informative, "Failed to generate MapBox resources bundle"
+      end
+    end
+    File.open(File.join(config.project_pods_root, target_installer.target_definition.copy_resources_script_name), 'a') do |file|
+      file.puts "install_resource 'Resources/MapBox.bundle'"
+    end
+  end
+
+  m.documentation = {
+    :html => 'http://mapbox.com/mapbox-ios-sdk/api/',
+    :appledoc => [
+      '--project-company', 'MapBox',
+      '--docset-copyright', 'MapBox',
+      '--no-keep-undocumented-objects',
+      '--no-keep-undocumented-members',
+      '--ignore', '.c',
+      '--ignore', '.m',
+      '--ignore', 'Proj4',
+      '--ignore', 'RMAttributionViewController.h',
+      '--ignore', 'RMBingSource.h',
+      '--ignore', 'RMConfiguration.h',
+      '--ignore', 'RMCoordinateGridSource.h',
+      '--ignore', 'RMDBMapSource.h',
+      '--ignore', 'RMFoundation.h',
+      '--ignore', 'RMFractalTileProjection.h',
+      '--ignore', 'RMGenericMapSource.h',
+      '--ignore', 'RMGlobalConstants.h',
+      '--ignore', 'RMLoadingTileView.h',
+      '--ignore', 'RMMapOverlayView.h',
+      '--ignore', 'RMMapQuestOpenAerialSource.h',
+      '--ignore', 'RMMapQuestOSMSource.h',
+      '--ignore', 'RMMapScrollView.h',
+      '--ignore', 'RMMapTiledLayerView.h',
+      '--ignore', 'RMNotifications.h',
+      '--ignore', 'RMOpenCycleMapSource.h',
+      '--ignore', 'RMOpenSeaMapLayer.h',
+      '--ignore', 'RMOpenSeaMapSource.h',
+      '--ignore', 'RMPixel.h',
+      '--ignore', 'RMProjection.h',
+      '--ignore', 'RMTile.h',
+      '--ignore', 'RMTileImage.h',
+      '--ignore', 'RMTileSourcesContainer.h',
+    ]
+  }
+
+  m.framework = 'CoreGraphics'
+  m.framework = 'CoreLocation'
+  m.framework = 'Foundation'
+  m.framework = 'QuartzCore'
+  m.framework = 'UIKit'
+
+  m.library = 'Proj4'
+  m.library = 'sqlite3'
+  m.library = 'z'
+
+  m.xcconfig = { 'OTHER_LDFLAGS' => '-ObjC', 'LIBRARY_SEARCH_PATHS' => '"${PODS_ROOT}/MapBox/Proj4"' }
+
+  m.preserve_paths = 'Proj4/libProj4.a', 'MapView/MapView.xcodeproj', 'MapView/Map/Resources'
+
+  m.dependency 'FMDB', '2.0'
+  m.dependency 'GRMustache', '5.4.3'
+  m.dependency 'SMCalloutView', '1.0.1'
+
+end