submit/trunk/20130308.083157

[Version] 0.3.73
[Project] GT-I8800
[Title] Release wrt-plugins-common_0.3.73
[Issue#] N/A
[Problem] 'on_frame_unload' plugin's callback is not invoked.
[Cause] stopSession() doesn't call 'on_frame_unload' function.
[Solution] changed to perform to erase a session at stopSession() only.
[Issue#] LINUXNGWAP-693
[Problem] loadInjectedJavaScript does not inject javascript
[Cause] Condition in the for loop prevents any files in the read
directory from being processed.
[Solution] Correct a condition in the for loop.
[Issue#] LINUXWRT-124
[Problem] Cppcheck appears some warnings for wrt-plugins-common.
[Cause] Incorrect code.
[Solution] Make some changes.
[Issue#]   LINUXWRT-130
[Problem]  Tests binaries should be named <reponame>-tests-<name>
[Cause]    N/A
[Solution] N/A
[Issue#]  N/A
[Problem] Compilation warnings appearing, part 2.
[Cause]   Incorrect code.
[Solution] Make some changes. Most of the changes are related to warning
"type qualifiers ignored on function return type". It is generated by
returning a constant pointer from function. I removed unnecessary consts
related with warnings.