1.2.0.0  Dec 2013

        * Update to Cabal 1.10 format
        * Remove NHC specific code
        * Add support for `base-4.7.0.0`
        * Improve `showCommandForUser` to reduce redundant quoting
        * New functions `callProcess`, `callCommand`, `spawnProcess` and `spawnCommand`
        * Implement WCE handling according to http://www.cons.org/cracauer/sigint.html
        * New `delegate_ctlc` field in `CreateProcess` for WCE handling
        * Use `ExitFailure (-signum)` on Unix when a proc is terminated due to
          a signal.
        * Deprecate `module System.Cmd`
        * On non-Windows, the child thread now comunicates any errors back
          to the parent thread via pipes.
        * Fix deadlocks in `readProcess` and `readProcessWithExitCode`
