Fix warnings
Fix LLVMRevision source URL in cpt.py

LLVMRevision is being retrieved from an old URL, which contains the wrong LLVM revision. Update it to point at the current cling repository.
Fix Markdown formatting and update CPT link.
Add a Travis-CI driver for github builds.
Checkout cling patches.
Add link to the last travis build result.
Recompile once more due to the little travis resources.
Speed up tutorial by plotting the posterior in less points (20 instead of 50)
Protection against extremely small 2D histograms' zoom box.
Suggested here: https://sft.its.cern.ch/jira/browse/ROOT-6673
Use the fully qualified name.
[modules] Use stdlib instead or strtol
[modules] Use sys/stat.h instead of conflicting mis-forward declarations.
[modules] Put the OptionParser into ROOT namespace, avoid conflict in glibc
[modules] Remove useless configuration defines. Breaks the modules concept.
[modules] Remove control macro.
[modules] Add strlcpy.h as required include.
[modules] Rename the template copied from TClass.
reference REPL is a way most people will recognize
Fix warning on SLC6
Do not auto replace explicitly set, default sized TTreeCache (ROOT-6698).