- Validate user values before using them

- You can now hold the Walk key (default is Alt) to force the cursor to be placed at a entity's center
- Added a option to change how many cursor snap points are available on a entity

- You can now use the Reload key to snap a entity to the grid (and hold the Use key at the same time to reset the angles)
- Cursor and entity ghost is done purely on the client-side now (so only the tool user can see them, also improves responsiveness)
- Use more of the provided features from the TOOL class to store states
- Added support for language files

- Take into account the sbox_maxconstraints limit (Thanks, Astralcircle!)

None Provided

- Draw the world grid
- Better ghost visuals

Initial addon creation.