fixes #3
Many browsers send '+' (plus sign) instead of ' ' (space) and '%2B' instead of '+' (plus sign)

According to Qt5 docs that are not decoded by QUrlQuery;
Ex. Safari
Merge pull request #4 from israelins85/IntegerConstantTooLarge

Fixes issue #3 "integer constant is too large for ‘long’ type" on OS X
add unit tests for QDjangoHttpRequest
make apt-get verbose
add a script to install build dependencies
Merge pull request #6 from israelins85/QUrlQueryIncompleteDecoding

Many browsers send '+' (plus sign) instead of ' ' (space) and '%2B' inst...
improve tests for QDjangoHttpRequest plus handling
fix handling of spaces encoding as "+"
test plus sign encoded as %2b