Installation instructions

Added a first version installation instruction.
Gitignore
Update .gitignore

Uploaded my local gitignore by a mistake.
Revert "Update .gitignore"

This reverts commit f4c23143ff7f88fda8df71d46dc80862c38c4932.
Update .gitignore

And ignore again since mac github wouldn't use local ignore.
Breaks the destiller on the linux and mac server i'm testing on. Also
PHP will normally know where the config files is located and if not
other techniques, external to the anta code should be used.
Extended troubleshooting section
Update ApiSquidController.php

Unsure if this is the right solution, but without the system crashes when $ymax = $ymin and we end out deviding by 0.
Mixed

- Clean up for installation instruction.
- Small spelling error that crashes script
Merge pull request #13 from bornakke/master

Some bug findings and a installation guide