Modified for making Download Manager working again for client running JAVA 7 U45.

Signed-off-by: unknown <panq@NCI-01874582.nci.nih.gov>
Change the version number from 5.2.0 to 5.2.1.

Signed-off-by: unknown <panq@NCI-01874582.nci.nih.gov>
Initial 5.2 branding changes for 5.2

First attempt at merging TCIA's NBIA version 5.0 branding changes into NBIA 5.2.
Move properties for new jar manifest secure attributes to project.properties from install.properties.
Modified for unsigning third part jars before signing it with NBIA certificate.
Merge tag 'NBIA-MASTER-5_2_1-20131120-1' into TCIA-5_2

CMDLine and GUI Installer Ready for Release 5.2.1
Added in missing logo for the Creative Commons license in images/cc-by.png
Temporarily change the NLST access link to CDAS

Short term fix for accessing the old thick client query tool while waiting
for the web-based query tool to be ready, and waiting for the database
conversion of NSLT to 5.2.1 to finish.
Fixed NBIA-663-TCIA: CTP issues along with git ignore
Set the "Search NLST" link to point to the new web based query tool.
Merge remote-tracking branch 'remotes/origin/NBIA-Branch-5.2.1' into TCIA-5_2
Merge branch 'TCIA-5_2' into TCIA-master