Added parenthesis to all print
Fixed imports, updated auth
Removed decode of pushName
More fixes

Fixed some remainig {}.has_key
Fixed tmp file encoding
Added classes which handle media upload/download
Merge branch 'master' into three

Conflicts:
	src/yowsup-cli
URL now specified on download
Merge branch 'master' into three
Fixed enc/decode of media previews
py3 libs
Extend bytearrays rather than concat
Merge branch 'master' into three
str rather than bytearrays
Merge branch 'master' into three
Encode filename before hash
Merge branch 'master' into three
More py3 compatibility
Merge branch 'master' into three
Fixed decoding of lines
Merge branch 'master' into three