... instead of running a sed script over a lot of files on each
version increment.

Should have been done earlier. 2.1.80 was burned in the pre-2.1.0->2.0.1
days, and we'd like to have odd subminor for 'working' and even subminor
numbers for pure cherry-picking release branches anyway.

Fix README, some spelling errors, remove contractions,
exclamation marks, correct some plural forms, join split messages.
Add QCoreApplication::translate to non-Q_OBJECT-classes.
Fix some lupdate warnings about discarding meta-data (//:).

 * Automatically reload task lists.
 * Add task handler to stop the reloading
 * Add some really simple API for other plugins to use.

This plugin enables loading of .tasks files into the Build Isssue list. This
is really nice if you need to e.g. browse results from static codecheckers
in creator.

Tasks files are simple tab-separated lists of one of the following forms:
description
type\tdesciption
file\ttype\description
file\tline\ttype\tdescription

The strings may contain escape codes:
\n for newline,
\t for tab
and \\ for a backslash