PeaZip 2.6.3

# added support for MS Office Template file types (a total of 90 file extensions
are now supported)
# PeaLauncher:

* fixed bug in exploring paths containing spaces
* fixed bug in exploring paths in full mode (when PeaLauncher is used as
standalone application)
* standardized ok and cancel buttons' position and icons

# Pea:

* fixed bug refusing chunck size bigger than maxint from command line
* fixed possible looping of application after internal_error procedure