WU12: Version Control API and family changes

Here the last 3-weeks WU :-)

Now the details.

vcsapi

oop branch:

FIXES

• Some minor changes/fixes (See indent, fix account cache loader, use item::fetchItemRevisionId() correctly, fix Item::pregMatch() calls, fix Item class is{File,Directory,Deleted}() calls, oop to Item::getHistory(), various fixes, move back Item::fetchCommitOperations() to a module function)

OO-ification

• split loaders from account class to a new class VersioncontrolAccountCache and from operation class to VersioncontrolOperationCache class, in the same way that VersioncontrolRepositoryCache works
• Re-structure repository urls behaviour:
  • make repo urls a VersioncontrolRepositoryUrlHandler class, where versioncontrol_get_url_* functions was converted to its methods(oop them)
  • move repo urls to repo::data['versioncontrol']['url_handler']. This will avoid having an independent urls cache and removes urls table.
  • remove all notion of the default url backend(jpetso and me could not find a good reason to maintain url backend as interchangable, so now we define only one type for url handler an use it directly)
• improve documentation: round 1 and round 2 (update lots of comments, document interfaces, update fakevcs module to oop way, move contents of hook_account to VersioncontrolFakeAccount class and OOP_TODO)
• move [backend]get_selected_label* to methods: convert [versioncontrol_backend]_get_selected_label_from_operation() and [versioncontrol_backend]_get_selected_label_from_other_item() to methods, Operation::getSelectedLabel() and Item::getSelectedLabelFromItem(), and make them abstract. In this way we make explicit to the language the "mandatory condition" of these to implementations and only interact with backends(not a hook to all modules).
• New interfaces
  • get_item vcs callback is now VersioncontrolRepositoryGetItem
  • {vcs}_{import,export}_accounts() are now part of VersioncontrolRepositoryImportExport(better names welcome! :p)

Also, rebase autoload and oop-dbtng branches to let them apply on top of actual oop branch.

git backend

master branch: one minor fix

• fix: actually let op::line_changes be set

oop branch:

• apply the same fix above
• sync with vc api

Also rebase autoload branch to let it apply on top of actual oop branch.