Hide concrete5 version number in upgrade page

If the constant APP_VERSION_DISPLAY_IN_HEADER is set to false,
unregistered visitors can still determine the currently installed
version by visiting the page /index.php/tools/required/upgrade.
Let's hide the version number when APP_VERSION_DISPLAY_IN_HEADER is
set to false.
Improve translation of "Edit block" message

This allows, for instance, to reverse the order of words.
get area handle and name through method which is easier to override
Revert "get area handle and name through method which is easier to override"

This reverts commit 3804e97eea47c29d944dfcd34c9f62c09a478e1b.
make it easier to derive generate sitemap job and add custom pages
C:\meschgit\work\concrete5github
Remove extra query and keep tab instead of space
Merge pull request #1 from mlocati/refactor-sitemap-job

Remove extra query and keep tab instead of space
Add events to GenerateSitemap job
Let's remove an useless function
Safer node removal approach
Merge pull request #2 from mlocati/refactor-sitemap-job

Add events to GenerateSitemap job
make wordSafeShortText() default

because this will usually be what most users want.
Removed unused variables and outdated comments
Simplify call to getValue when called with 2 parameters

If func_num_args() is 2 then we can avoid call_user_func_array
and call $av->getValue() directly (that's faster)
make area name translatable
Fix Missing Autoloaders File Type Inspectors

Fix Missing Autoloaders File Type Inspectors

Add file type inspector classes to startup/autoload

- Add FileTypeInspector
- Add ImageFileTypeInspector
- Add FlvFileTypeInspector
Fix outdated cache after saving tracking codes
class added to login form

it's a bit tricky to style the login form since we don't have a
class. This PR adds a class, no sure about the official name
conventions here but it makes styling much easier.
fix mixin call

the order of the parameters is wrong
https://github.com/concrete5/concrete5/blob/master/web/concrete/css/ccm_app/twitter_bootstrap/mixins.less#L139