Improve else line indent

else line indentation can be calculated.
Move to back-to-indent position without indentation
Add test about no indentation but moving cursor
Add indentation tests for try-catch block
Improve test names and those docstrings
Add private function test for indentation
Improve indentation command for try-catch block
Update Copyright year
Add test for indenting else line in string
Add test not indenting case for else line
Fix indent size
Add dedent case test
Merge pull request #259 from defunkt/improve-else-line-indent

Improve else line indent