Merge pull request #24 from pierre-haessig/qt-gtk-fix

qt recipe fixes
Merge branch 'master' of github.com:conda/conda-recipes
Add apr 1.5.0.  Includes apr-iconv-1.2.1 and apr-util-1.5.3.
Merge branch 'master' of https://github.com/pydata/conda-recipes
Add libtool 2.4.2.
First pass of DataNitro trial package.
Remove trailing whitespace.
Checkpoint commit of datanitro-trial progress.
Remove debug echos, tweak error handling.
Add python runtime dependency.
Add silent flag to installer.
Add /min to cmd.exe.
Add e-mail prompt.
Tweak e-mail prompt.
Convert to ascii.
Convert to ascii.
Check for pre-requisites.
Implement uninstaller functionality.
Exit via abort_installation if user does not accept license agreement.
Bump version number.