Adds some more entries to the list of ignored files.
Adds link to manual thread memory section from threads module.
Adds note to quit() about being called for termination.
Adds note about grouping to split iterators.
Merge pull request #425 from gradha/pr_ignore_generated_files

Adds some more entries to the list of ignored files.
Merge pull request #426 from gradha/pr_misc_doc_improvements

Misc doc improvements
todo.txt changes
new effect system should be sound now
Merge branch 'master' of github.com:Araq/Nimrod
Merge branch 'newtempl' of github.com:Araq/Nimrod
Fixes #428
added a ``noforward`` pragma that enables a new compilation strategy
not requiring forward declarations on a per-module basis
switch to a linked list of scopes
get rid of the SymTab* procs in astalgo
get rid of ImportTablePos and ModuleTablePos
get rid of TOverloadIter.stackPtr
final fixes giving us a working compiler
merged the persistent scopes work with the delayed proc compilation strategy
documented the ``noforward`` pragma
Merge branch 'master' of github.com:Araq/Nimrod into upstream