Two issues fixed

I fixed two small issues: when reopening the tabs, Asciidoc is now shown again (before, the tabs were not loaded, and you had to reopen the file). Also changed the tab sequence.

Also, when releasing this plugin, don't compile it using JDK 1.7, but use JDK 1.6, otherwise it gives issues on a lot of IntelliJ/other products (there is already an issue for that).