Add license information to the header and source files

Having checked all the current Playground projects. This license selection seems
to be the most appropriate according to the other playground project licenses:
https://qt.gitorious.org/qtplayground/

In fact, QtSerialPort is the only Playground project which does not have license
yet. This patch tries to amend that gap. It is going to provide more trustworthy
situation about the usage of the module to commercial customers right away.
As for now, it looks a bit undefined what license this project goes for in the
end even if it is guessable. Commercial customers (perhaps even hobbyists) would
like to make sure they can reuse this library the way, they wish (aka. No GPLvX
and so forth).

Change-Id: Ia3a4e48a5140696f749df9fb5a8391955afaa637
Reviewed-by: Lars Knoll <lars.knoll@nokia.com>
Reviewed-by: Denis Shienkov <scapig@yandex.ru>

1 files changed, 22 insertions, 0 deletions

diff --git a/LGPL_EXCEPTION.txt b/LGPL_EXCEPTION.txt
new file mode 100644
index 0000000..a54c00e
--- /dev/null
+++ b/LGPL_EXCEPTION.txt
@@ -0,0 +1,22 @@
+Nokia Qt LGPL Exception version 1.1
+
+As an additional permission to the GNU Lesser General Public License version
+2.1, the object code form of a "work that uses the Library" may incorporate
+material from a header file that is part of the Library.  You may distribute
+such object code under terms of your choice, provided that:
+    (i)   the header files of the Library have not been modified; and
+    (ii)  the incorporated material is limited to numerical parameters, data
+          structure layouts, accessors, macros, inline functions and
+          templates; and
+    (iii) you comply with the terms of Section 6 of the GNU Lesser General
+          Public License version 2.1.
+
+Moreover, you may apply this exception to a modified version of the Library,
+provided that such modification does not involve copying material from the
+Library into the modified Library's header files unless such material is
+limited to (i) numerical parameters; (ii) data structure layouts;
+(iii) accessors; and (iv) small macros, templates and inline functions of
+five lines or less in length.
+
+Furthermore, you are not required to apply this additional permission to a
+modified version of the Library.