Merge pull request #49 from zyfang/indigo-devel

added highlight function for direct integer representation of hex
Merged pull request #44 manually.
added wrapper predicates for reading the object dimensions and color
changed queries in marker visualization to wrapper predicates (which allow to compute this information in different ways)
added a restriction on 'nonvar(class) to the clause of owl_individual_of that handles restrictions. This disables searching for all classes that an instance may be part of based on its properties (classification of instances), but increases performance when checking the types since not all classes have to be considered.
updated module comments to remove pldoc warnings
removed 'register_ros_package' call; jpl has become system dependency
ignore (auto-generated) doc folder
fixed and completed documentation for comp_orgprinciples
fixed and added pldoc comments in comp_temporal, knowrob_actions, knowrob_common, knowrob_monog
Fixing incremental queries by attaching prolog queries to individual threads.
added generic 'inspect' predicate that reads property-value pairs for both classes and instances
Added web-based browser for OWL data

All properties P and values O returned by 'inspect(ID, P, O)' are listed in a table format. Data properties are just shown as plain text, while object properties, which refer to other OWL entitites, are links to a visualization of that respective entity.
fixed wrong order of depth/width queries
update plus new queries