Submodule updates: RSpec, Shell Script

RSpec.tmbundle: 7c6e4ff..a884acf

  * a884acf Fix "Run Current Context" for RSpec 3 (Stefan Daschek)

Shell Script.tmbundle: 8d7e4ab..713cf26

  * 92cb195 Add a `do … done` loop snippet. (Martin Kühl)

  * 250484f Support interpolation inside parameter expansion. (Martin Kühl)

    Closes #9.

  * 152bba9 Recognize `+` as a variable expansion operator. (Martin Kühl)

  * e160c17 Support putting `then` on the next line. (Martin Kühl)

  * 53738bb Switch default `case` snippet indentation. (Martin Kühl)

  * a5fcaec Use pure Korn shell syntax for functions. (Martin Kühl)