Update info for 1.0.0 rc1

CHANGELOG

+CHANGELOG
+=========
+
+1.0.0
+-----
+
+This is a backwards incompatible feature and bugfix release.
+
+  * Renamed all classes and defines from 'gentoo' to 'portage'
+  * Bugfixes for the package_use parsedfile provider
+  * Metadata corrections to add concat as a dependency
+  * Site specific files removed
+  * Removed legacy defined types for package.* entries
+  * Removed unusable localegen and category defined types
+
+Major thanks to Theo Chatzimichos testing the module and reporting/fixing
+bugs.

Modulefile

 name 'adrien-portage'
-version '0.1.0'
+version '1.0.0-rc1'
 license 'GPLv2'
 summary 'Puppet types and providers for Gentoo portage'
 project_page 'https://github.com/adrienthebo/puppet-portage'