ignore vim swap files

Signed-off-by: Fudong Bai <fudongbai@gmail.com>
fixed build errors using mvn

errors like these were fixed:
a.
[ERROR] ~/iqq/api/src/main/java/iqq/api/annotation/IMEventHandler.java:[33,1] error: annotations are not supported in -source 1.3
[ERROR] (use -source 5 or higher to enable annotations)

b.
[ERROR] ~/iqq/api/src/main/java/iqq/api/event/IMEventDispatcher.java:[46,16] error: generics are not supported in -source 1.3
[ERROR]
[ERROR] (use -source 5 or higher to enable generics)

Signed-off-by: Fudong Bai <fudongbai@gmail.com>
remove log file

Signed-off-by: Fudong Bai <fudongbai@gmail.com>
current version of webqq-core is 1.1

Signed-off-by: Fudong Bai <fudongbai@gmail.com>