Changelog for process-1.2.0.0

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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`