SES-1922 fix by introducing a mapping from ValueConstant to Var to
preserve identity.
SES-1922 modified creation of constant vars to remove need to keep an
in-memory mapping. Instead, we use the string-rep of the value itself to
create a unique var name for the given constant value.
SES-1920 minor code cleanup
SES-1922 introcuded isConstant boolean flag in Var.
EvaluationStrategyImpl uses this to filter Vars representing constant
values out of binding sets.
SES-1922 added unit test for case described in issue; greenlines after
fix.
SES-1919 includeInferred parameter now consistently passed along on all
remote query requests.
Merged in ses-1919 (pull request #194)

SES-1919 includeInferred parameter now consistently passed along on all remote (SERVICE) queries
Merged in ses-1922 (pull request #193)

SES-1922 fix for parse issue with ValueConstants in property paths.
set version to 2.7.6
[maven-release-plugin] prepare release 2.7.6
[maven-release-plugin] prepare for next development iteration