file-manager: Add "Show in File manager" action to document popup.

https://bugzilla.gnome.org/show_bug.cgi?id=571749
Updated Lithuanian translation
Updated Spanish translation
Updated Uyghur translation

Signed-off-by: Gheyret Kenji <gheyret@gmail.com>
build-basic-autotools: Fix selection of build directory
build-basic-autotools: Use a GtkFileChooser dialog instead of a GtkFileChooserButton to select build directory

By using a standard button, the build directory doesn't need to be created
before displaying it. In addition, it is possible to always start the file chooser
dialog in the project directory.
quick-open: Fix typo in distributed files
libanjuta: add get_info_widget() function to IAnjutaProvider

It can be used by the provider to provide a special widget to show extra information
about the proposal.
parser-cxx: Implement ianjuta_provider_get_info_widget()
snippets-manager: implement ianjuta_provider_get_info_widget()
language-support-python: implement ianjuta_provider_get_info_widget()
language-support-js: implement ianjuta_provider_get_info_widget()
language-support-vala: implement ianjuta_provider_get_interface()

Regenerate the .vapi file to be able to do this.
sourceview: Use the new ianjuta_provider_get_info_widget() function
libanjuta: Add user_data field to AnjutaLanguageProviderProposal

So that users can of AnjutaLanguageProvider can add extra custom data
to the proposals.
sourceview: Take a reference to the IAnjutaProvider when adding it.
parser-cxx: explicitly uninstall provider when editor is removed

Since ianjuta_editor_assist_add() now takes a reference to the passed in
provider just unreffing the provider is not enough to get it removed.
language_support_python: explicitly uninstall provider when editor is removed

Since ianjuta_editor_assist_add() now takes a reference to the passed in
provider just unreffing the provider is not enough to get it removed.
devhelp: Port to webkitgtk2

Conditionally build the plugin against the webkitgtk version that libdevhelp is
built against.
devhelp: WIP