updated MapReduce API docs
updated mapreduce api tutorial
updated the remainder of the tutorial
updated installation instructions
removed completed projects from ideas list
added a tool for dumping app help to an rst table
app/main: added support for the help dumper tool
updated pydoop script guide
updated running_pydoop_applications
removed obsolete docs
updated examples section
updated self_contained
added/fixed many cross-references
Merge pull request #71 from simleo/update_docs

Update docs