Import sphinx generated docs into application

[robmcmullen]

[Trac time 20091025 183010Z] The sphinx generated docs can be used by the HtmlHelpController, so instead of the dummy help text, import the html into the main peppy code and display the same help text as available on the web.

[robmcmullen]

[Trac time 20091025 183438Z] 4877f54 Fixed #787: added initial HtmlHelpController code

• changed sphinx make process to put duplicate copy of htmlhelp files into peppy/help
• modified setup and manifest to include the html files with the code when being distributed
• changed help actions to use HtmlHelpController
• added showHelp to main application to display HtmlHelpController
• added get_package_data_dir
• added stub action to display help text for major mode