Fix URLs and content_length checking

For:

 - AP Grapher
 - cfxr
 - WavTap
 - XtraFinder

Fixes #148.

Signed-off-by: Felix Saparelli <me@passcod.name>

Casks/ap-grapher.rb

@@ -2,6 +2,6 @@ class ApGrapher < Cask
   url 'http://www.chimoosoft.com/downloads/current/APGrapher.dmg'
   homepage 'http://www.chimoosoft.com/products/apgrapher/'
   version 'latest'
-  no_content_length
+  content_length '1113716'
   no_checksum
 end

Casks/cfxr.rb

@@ -1,5 +1,5 @@
 class Cfxr < Cask
-  url 'http://github.com/downloads/nevyn/cfxr/cfxr 0.2.1.zip'
+  url 'http://github.com/downloads/nevyn/cfxr/cfxr%200.2.1.zip'
   homepage 'http://thirdcog.eu/apps/cfxr'
   version '0.2.1'
   content_length '756001'

Casks/wav-tap.rb

@@ -1,5 +1,5 @@
 class WavTap < Cask
-  url 'https://github.com/downloads/pje/WavTap/WavTap 0.2.0.pkg'
+  url 'https://github.com/downloads/pje/WavTap/WavTap%200.2.0.pkg'
   homepage 'https://github.com/pje/wavtap'
   version '0.2.0'
   content_length '1139070'

Casks/xtra-finder.rb

@@ -2,6 +2,6 @@ class XtraFinder < Cask
   url 'http://www.trankynam.com/xtrafinder/downloads/XtraFinder.dmg'
   homepage 'http://www.trankynam.com/xtrafinder/'
   version 'latest'
-  no_content_length
+  content_length '1870081'
   no_checksum
 end