Merge topic 'FixRForTestDataPath'

b8eab4f BUG: including correct path to cthead1.png for R
1ec6128 BUG: Update data path for ExternalData for R data
Merge topic 'FixTCLDependency'

caf15d4 BUG: added extra dependencies for TCL
Merge branch 'master' into next

Change-Id: Ida99a790fb3682291218d1fe51dff62c108d5f23