Added bookmarks to records

You can add a bookmark using BotMimic_SaveBookmark while recording and
jump to it using BotMimic_GoToBookmark while mimicing.
Added BotMimic_GetRecordBookmarks native

Returns a list of all bookmarks included in a record.
List bookmarks in botmimic_menu

You can list all bookmarks in a record and jump to them, if a player
currently mimics the record.
Fixed bookmarks not saving weapon and teleporting back
Added sm_savebookmark command to botmimic_menu

Saves a bookmark with the given name in the record the target records.
sm_savebookmark <name|steamid|#userid> <bookmark name>
Merge pull request #1 from peace-maker/bookmarks

Add bookmarks in record files