upload file unico files.ext
Merge branch '1.9.x' of github.com:beeznest/chamilo-lms-utp into 8186.anibal
 main/document/upload.php
rstore main/inc/ajax/document.ajax.php
actualizacion segun observaciones yannick (PRS, validacion path)
Remove html tags from the table title and replace deprecated function - refs BT#8407
utf8 decode and allow export to xls - refs BT#8340
Merge pull request #48 from DeEvo/8186.anb

subir archivos unicos --ref BT#8186
Merge pull request #52 from DeEvo/8228

8228
Merge pull request #53 from DeEvo/8407

8407
Fix bug, bad performance using api_is_coach(). Set value in variables and $_SESSION -refs BT#8403
Merge pull request #55 from DeEvo/8403

Fix bug -refs BT#8403
Fix bug, these changes should go with previous commit -refs BT#8403
Get just the completed exercices - refs BT#8423
Adding fix attempt script  see BT#8423
Updating also table TABLE_LP_ITEM_VIEW.
Fixing condition.
Fixing condition.
Auto fixing multiple events. Removing all except the best one attempt see BT#8423
Saving only the first attempt, deleting the others see BT#8423