Added in the basics for a text tool. Text is not user-generated yet, will work on that next. Still need to add an icon for the text toolbar as well.
Adding a prompt to collect the text from the user
Ensuring that the text color is alwas set to the primary color that is selected (the line drawing color)
Setting default font value. This could eventually be broken down into an additional tool, the same way the line with selector is.
Adding the text widget to the toolbar by default
Misc code cleanup
Setting the text tool as selected before prompting the user for the text. This should give the button the correct state earlier
Remove now-unused locked attribute
Finish the text tool (better UI, icon)
Merge pull request #77 from irskep/text-tool

Text tool