Modified travis to not compile plugins

Thanks to Haruna.

Signed-off-by: shennetsind <ind@henn.et>
Follow-up to 3b0cd11f980a48b903262c857fde1cd9c784c2e0

- Changed <?  ?> to <"  "> after some further brainstorming. Special
  thanks to Yommy.

Signed-off-by: Haru <haru@dotalux.com>
Follow-up to 124ab2a1cdb344f24170a4d91f7000ebabf39b40

- Changed a few leftover NPC IDs to constants
- Note: we're still missing support for mob sprite constants, so the
  NPCs using mob sprites are still not converted.

Signed-off-by: Haru <haru@dotalux.com>
pc_groups interfaced

The last file without a interface is now no more (date.h doesn't count :P).
Modified the way permissions are stored in order to enable plugins to be able to create permissions ( pcg->add_permission("name") [returns permission key] ).
Special Thanks to Haruna!
Closes #121

Signed-off-by: shennetsind <ind@henn.et>
Merge branch 'master' of https://github.com/HerculesWS/Hercules
HPM Hooks Update

Signed-off-by: HerculesWSAPI <Hercules@efficiently.awesome>
Merge branch 'master' of https://github.com/HerculesWS/Hercules
Merge branch 'master' of https://github.com/HerculesWS/Hercules
Merge branch 'master' of https://github.com/Xyphercs/Hercules