smarter calculation of showed associated changeset in file source view - before rhodecode showed TIP changeset when initially displaing file source as description of associated commit this can be misleading. Now smart calculate last commit of a file, and show specific commits when switching from history view

syntax: glob
*.pyc
*.swp
*.sqlite
*.tox
Paste*.egg

syntax: regexp
^rcextensions
^build
^docs/build/
^docs/_build/
^data$
^\.settings$
^\.project$
^\.pydevproject$
^\.coverage$
^rhodecode\.db$
^test\.db$
^RhodeCode\.egg-info$
^rc\.ini$
^fabfile.py
^\.rhodecode$