misc: move handling CONFIG_DIR up

Signed-off-by: Rafał Malinowski <rafal.przemyslaw.malinowski@gmail.com>
core: rename configuration directory to profile directory

Signed-off-by: Rafał Malinowski <rafal.przemyslaw.malinowski@gmail.com>
core: better creation of KaduPaths with visible dependencies

Signed-off-by: Rafał Malinowski <rafal.przemyslaw.malinowski@gmail.com>
core: remove not needed setting LC_COLLATE

Signed-off-by: Rafał Malinowski <rafal.przemyslaw.malinowski@gmail.com>
core: remove useless and ugly code from main.cpp

Signed-off-by: Rafał Malinowski <rafal.przemyslaw.malinowski@gmail.com>
core: replace qApp pointer with KaduApplication unique_ptr

Signed-off-by: Rafał Malinowski <rafal.przemyslaw.malinowski@gmail.com>
core: remove some unneeded includes

Signed-off-by: Rafał Malinowski <rafal.przemyslaw.malinowski@gmail.com>
core: remove SAVE_STDERR option

Ugly implementation. If anyone cares - create it from scratch with some
nice code.

Signed-off-by: Rafał Malinowski <rafal.przemyslaw.malinowski@gmail.com>
core: do not predent that configFile requires whole file path

Signed-off-by: Rafał Malinowski <rafal.przemyslaw.malinowski@gmail.com>
core: call static method in a static way

Signed-off-by: Rafał Malinowski <rafal.przemyslaw.malinowski@gmail.com>