add .idea to .gitignore and fix typo in BUILD.rest

Author: sampeson

.gitignore

@@ -4,6 +4,7 @@
 .project
 target
 
+.idea
 *iml
 *ipr
 *iws

BUILD.rest

@@ -18,5 +18,5 @@ Releasing
 - update version number to pom.xml
 - create git tag for new version
 - mvn deploy deploys the library to maven central. See instructions on Robot Framework releasing for the prerequisites.
-- Go to https://oss.sonatype.org/index.html#welcome, log in with Sonatype creadentials, find the staging repository and do close & release
+- Go to https://oss.sonatype.org/index.html#welcome, log in with Sonatype credentials, find the staging repository and do close & release
 - Update the download links from README and Release notes: http://search.maven.org/remotecontent?filepath=org/robotframework/javalib-core/1.2/javalib-core-1.2.jar