Update README.md
Update README.md
Fix keyboard issues for non-us inputs

1) @ and + opens the autocompletion boxes regardless of keyboard layout
2) . and ? reloads and opens the help view regardless of keyboard layout
Merge pull request #176 from kvakulo/fix-keyboard-shortcuts

Fix keyboard issues for non-us inputs (fixes #130)
Fix exceptions if keys pressed while no task is selected

Null pointer exceptions were thrown if X, D, U or P were pressed while
no task was selected in the list box. For instance this happens when
the todo list is empty. Guard clauses have been added to prevent the
commands to execute when no task is selected.
Only add new task if it contains text

When Enter is pressed in the description field, but no text is entered,
then this change prevents an empty task being created.
Merge pull request #178 from kvakulo/fix-empty-task

Only add new task if it contains text
Merge pull request #177 from kvakulo/fix-no-task-selected

Fix exceptions if keys pressed while no task is selected
The font weight was not being saved to the user settings

1) Save the font weight to the user settings
2) Show the font weight and font style in the options dialog as in the font dialog
Merge pull request #179 from kvakulo/fix-save-font-weight

The font weight was not being saved to the user settings
Allow a negative value when "postponing" a task

Effectively bringing the task forward to an earlier due day.
Add "O" as access key in the filter dialog
Merge pull request #181 from kvakulo/fix-allow-negative-postpone

Allow a negative value when "postponing" a task
Merge pull request #182 from kvakulo/add-access-key-to-ok-button

Add "O" as access key in the filter dialog
Installer configuration for Inno Setup
Added simple bat file to run inno setup compiler from command line
Merge pull request #183 from kvakulo/inno-installer

Inno installer
Preparing release 2.3.0