Reorder keywords to ensure longer keywords get highligted

Longer keywords were not entirely highlighted. For instance,
in the 'Run Keyword And Expect Error' keyword, only the part
'Run Keyword' would get highlighted. Regex would match the
first part of the keyword and ignore the rest. A simple fix
was to reorder keywords by placing short keywords after longer
ones.
Merge pull request #9 from finspin/master

Reorder keywords to ensure longer keywords get highligted