Remove the installation restriction about Ubuntu

docs/install.rst

 Installation
 ^^^^^^^^^^^^
 
-This guide describes how to install snf-image-creator on an Ubuntu 12.04 LTS
-system. It is highly recommended to have virtualization capable hardware.
-snf-image-creator will work on processors that do not support virtualization
-but it will be extremely slow.
+This guide describes how to install snf-image-creator on your machine. It is
+highly recommended to have virtualization capable hardware. snf-image-creator
+will work on processors that do not support virtualization but it will be
+extremely slow.
 
 Dependencies
 ============
@@ -22,11 +22,14 @@ snf-image-creator depends on the following programs:
  * Python interface to sendfile [http://pypi.python.org/pypi/pysendfile]
 
 The above dependencies are resolved differently, depending on the installation
-method you choose.
+method you choose. There are two installation methods available:
 
-There are two installation methods. The first uses official packages whereas
-the second installs snf-image-creator and its dependencies from source. Both
-methods are presented below.
+#. `Install snf-image-creator using official packages`_ (currently only for
+   Ubuntu 12.04, more OSes will be supported soon)
+#. `Install snf-image-creator from source`_ (provided you meet the above
+   dependencies)
+
+Both methods are presented below.
 
 Install snf-image-creator using official packages
 =================================================

docs/usage.rst

@@ -58,7 +58,7 @@ found, before extracting the image. Both can be disabled by specifying
 *--no-sysprep* and *--no-shrink* respectively.
 
 If *--print-sysprep* is defined, the program will exit after outputing a
-list of enabled and disabled system preparation operation appliable to this
+list of enabled and disabled system preparation operation applicable to this
 media source. The user can enable or disable specific *syspreps* when creating
 an image, using *-{enable,disable}-sysprep* options. You can specify those
 options multiple times to enable or disable multiple *syspreps*.
@@ -287,7 +287,7 @@ to the user to do it.
 Swap partitions
 ---------------
 
-If you want your image to have a swap partitions, make sure this is the last
+If you want your image to have a swap partition, make sure this is the last
 partition on the disk. If snf-image-creator detects a swap partition in the end
 of the input media, it will remove the partition when shrinking and will save
 enough information to be able to recreate it during image deployment. This will