libretroshare: implement RsGxsWikiEvent and clean dummy code

[alvaro-salort]

Implemented rsEvents for the Wiki service to allow real-time UI updates.
Removed legacy dummy code and unused tick events from 2012.
Matches the architecture of GxsChannels.

[defnax]

Hi you forget to commit the changes for p3wiki.h? it does not compile yet
ok i saw you removed not implemented features too

maybe for that needs a new pr next time for implement :)

/* Specific Service Data */
virtual bool getCollections(const uint32_t &token, std::vector<RsWikiCollection> &collections) override;
virtual bool getSnapshots(const uint32_t &token, std::vector<RsWikiSnapshot> &snapshots) override;
virtual bool getComments(const uint32_t &token, std::vector<RsWikiComment> &comments) override;

virtual bool getRelatedSnapshots(const uint32_t &token, std::vector<RsWikiSnapshot> &snapshots) override;

virtual bool submitCollection(uint32_t &token, RsWikiCollection &collection) override;
virtual bool submitSnapshot(uint32_t &token, RsWikiSnapshot &snapshot) override;
virtual bool submitComment(uint32_t &token, RsWikiComment &comment) override;

virtual bool updateCollection(uint32_t &token, RsWikiCollection &collection) override;

// Blocking Interfaces.
virtual bool createCollection(RsWikiCollection &collection) override;
virtual bool updateCollection(const RsWikiCollection &collection) override;
virtual bool getCollections(const std::list<RsGxsGroupId> groupIds, std::vector<RsWikiCollection> &groups) override;

[csoler]

For plugins the event system can allocate a event type dynamically, so that you do not need to modify rsevents.h. Use RsEvent::getDynamicEventType("some string") to get one. Instead of using RsEventTypes::GXS_WIKI, use rsEvents->getDynamicEventType("GXS_WIKI"); (or store the result in a variable).

[defnax]

@alvaro-salort we need keep licence header

[JohannesKleine]

git pull --rebase origin master does the trick without merging the remote, but it requires a force push after it, advantage it keeps the git tree easyer to read