Add support for SLES 11

Adds support for SLES 11 using the package postgresql91.
MODULES-1213 link pg_config binary into /usr/bin if not already in /usr/bin or /usr/local/bin
MODULES-1213 remove inadvertantly added vagrant-wrapper gem
MODULES-1213 fix typo
Manage pg_ident.conf by default
Merge pull request #460 from hunner/default_pgident

Manage pg_ident.conf by default
Merge pull request #450 from jantman/MODULES-1213

MODULES-1213 link pg_config binary into /usr/bin if not already in /usr/bin or /usr/local/bin
remove duplicatie "description" line from Metadata.json
Fixed deprecation warning for class param  in server.pp. Changed subclasses of server to use ::_version, which will be assigned the value from globals or (deprecated) class param.
Merge puppetlabsmaster in initdb_ordering_issue
Fix typo
Merge pull request #437 from dinerroger/sles_support

Add support for SLES 11
Merge pull request #470 from igalic/patch-1

remove duplicatie "description" line from Metadata.json
Merge pull request #471 from poikilotherm/master

Fixed deprecation warning for class param  in server.pp.
Bump deps for postgresql 4.0 release
Merge pull request #448 from aswen/initdb_ordering_issue

Initdb should create xlogdir if it has been set.
Merge pull request #475 from hunner/bump_deps

Bump deps for postgresql 4.0 release
Changes to support OpenBSD.

Added $service_reload parameter to params.pp, in order to allow
a reload of the postgresql server on OpenBSD, which apparently doesn't
have a service binary.

Add $service_reload to the global variables.

document service_reload parameter in README.md