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merge mainline
Revert "merge mainline"

This reverts commit 4de1515252035760970c6a296c72b84831beb583.
Fixed default conf file and symlink script
Merge remote-tracking branch 'origin/master'
Fixed bugs for grounding vars via selecting values by Pattern Matching
Fixed a bug for cloning a state .
Add PLN BeforeTransitivityRule
You can load keyvan's HebbianMiningAgent with loadpy
Add an option for ECAN to spread attention across all links, not just HebbianLinks
Add up the total strength of links between atoms
fixed bugs in checking state in temporary state list
Fix property and method names in HebbianMiningAgent
Fixed a bug for get the current real variable value from a state
Fixed bugs for updating new variable bindings.
Some cmake-related fixes for hypertable, sigar and moses
Removed benign warnings about uninitialised variables
Removed a host of warnings mostly about sign comparation - Issue #261
Removed deprecation warnings in gtk-visualizer - Issue #261
Removed unused variables,results  warnings - Issue #260 and #261