Python-perforce

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* Added a base class for perforce objects to wrap dict getter
* Added Stream object Fixes 25
* Added tests for new classes Fixes 26
* Added tests for Revision objects as it was lacking
* __getVariables will no longer show a console on windows Fixes 24
* Client and Stream are now exposed at the package level Fixes 23

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* Added Client object
* Added better support for finding p4 env variables
* Added PendingDeprecationWarnings to Changelist and Revision to accept an optional Connection object. If not provided, it will use whatever settings it can find to create one
* For Changelist, Revision, and Client, added __getattr__ to use the underlying dict to allow use of all fields if not directly supported by this lib
* Connection.run() now requires a list instead of a string for the command. A PendingDeprecationWarning will be thrown if a string is used. Strings will not be supported in 0.4.0

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* Changelist objects are lazy and will only query files as needed

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* Fixed bugs regarding spaces in file names or specs
* Fixed bug that may have left too many file handles open
* Added comparison operator to Changelist

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* Added __iadd_ operator to Changelist
* Added unchanged_only flag to Changelist.revert()
* Added exclude_deleted flag to Connection.ls()
* Fixed a bug on windows that would occur if the command line was too long (>8190)
* Added setter to Connection.client
* Changelist.append will now raise a RevisionError if the file to append is not under the clients root

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* Changed the argument order for Revisions to be consistent with everything else. Supports backwards compatible argument orders
* Fixed bug that would attempt to checkout files when querying a changelist