minor fixes for 2.3.4

= 2.3.4 =
* Fix bug in load_plugin_textdomain call
* Readme improvements
* Change value input size to match label field

Signed-off-by: Nick Ciske <nick@thoughtrefinery.com>

git-svn-id: https://plugins.svn.wordpress.org/salesforce-wordpress-to-lead/trunk@900086 b8457f37-d9ea-0310-8a92-e5e31aec5664