Changed wrong translation of identantion

In portuguese, there is no "endentação", but "indentação".
Updated last translator
Don't prompt for reload from infobar when there are no unsaved changes

Also warn about losing undo history when there are no changes.
Don't rebuild TagManager workspace tags when quitting

Updating the workspace is useless as the application will be shut down,
and not doing it can save a lot of time (almost 50% speedup quitting an
instance with all Geany source from `src/` open).
Merge pull request #344 from marcelocamargobr/master

Changed wrong translation of identation
Merge pull request #350 from ntrel/reload-prompt

Don't prompt for reload from infobar when there are no unsaved changes
Merge pull request #353 from b4n/tm-no-update-on-quit

Don't rebuild TagManager workspace tags when quitting
Query GdkWindow reference only if available

On startup, the Geany main window doesn't have a GdkWindow yet
(probably because it is not yet mapped). This causes many
'gdkdrawable-win32.c:2013 drawable is not a pixmap or window'
warnings when resolving shortcuts on Windows.
Since we pass the SLR_NO_UI to the Windows API, we probably
don't need the parent hWnd reference at all.
Prepare Windows installer for embedded GTK 2.24
Fix moving editor tabs through keybindings
Add note about -D_FILE_OFFSET_BITS=64
Add coffescript syntax highlighting

imported lexer from Scintilla and added coffeescript filetype
Select to matching brace

The feature of jumping in between braces is really useful. Often I find me wanting to select the text in between braces. So I added the feature to geany.

The default keybinding I used is Ctrl-Shift-B because Ctrl-B goes to the matching brace.

geany.txt is updated for documentation.
removed TODO tag
Search matching brace

The keybinding for searching matching braces is only useful, when the cursor is located close to a brace. If the cursor is in the middle of a block the keybinding is useless. I've changed the behaviour in order to go to the start of the current block. It is given by a solitary opening brace.
Open files from selection

In LaTeX a document can be included using \include{filename}.
For this command the extension of the file 'filename' is not necessary.
Therefore, opening the file from a selection did not work. I've
added all the tests that are needed to check if the selected file
exists if the extension of the current file type is added to the
name. Thus, in the example above the file 'filename.tex' is opened
properly.
Open files from selection

- Removed redundant check for file existence.
- Using doc->file_type to determine the current file extension
- fixed styling of brackets
Open selected files by adding file type extension

Added documentation for the new behaviour while opening files from a selection.
Open files from selection

 - added documentation for the feature below the section `Switching between documents`
Open selected files

 - refactored code