Added docgen documentation
Fixes two minor typos.
Reformats text to fit width of 80 columns.
Adds docgen to list of documentation to build.
Adds some cross references to docgen manual.
Transforms docgen sample to be generated from source.
next steps for closure iterators
nest PreMain inside NimMain for easier consumption of static libraries developed in Nimrod

fixes many uses of $N instead of $n for new lines that don't affect #line directives
fix the error "only proc headers can feature pragmas" when compiling in JS mode
closure iterators almost work
closure iterators work
small code cleanups
Merge branch 'devel' of https://github.com/Araq/Nimrod into devel
typeClasses now documented in grammar.txt
renderer knows about nkStaticTy and nkTypeClassTy
should compile on netbsd
support for parametric user-defined type classes
implements #766;

expressions such as Type.field are now recognised by the compiler.
This also fixes a bug, preventing the user-defined to check for the presence of
regular fields in addition to procs
nativeStackTrace might work again
updated asyncio and ftpclient modules