Merge pull request #1 from Ferada/master

Add ITERATE, remove missing file from system.
raw parser: output structure improvements
raw parser: document the structure
Drop the legacy code
Add a .gitignore
raw parser: ORG/ORG-ENTRY: make section mandatory, but NIL-able
raw parser/test: use parser-combinators:position-of
raw parser/title: slightly fix and reshuffle
raw parser: deconflict org-parse/org-parse-string names
flesh out the org-node class
Define conditions
Implement "dressing" of raw AST as ORG-NODE's
Put ORG-RAW-*-P predicates to their place
Cease the ORG-DOCUMENT non-uniformity, as it is of no benefit as yet
Edge/node mapping
raw parser/documentation: fixes
mid-layer parser: prettier dress
flat presentation: ORG-PRESENT :FLAT
src/utils.lisp: drop
cl-org-mode-slots: new package for optional, convenient slot access