Prequel 1.11.11-beta

[BREAKING][REFACTOR] Config: DB key renamed to database; changed all child keys to lowercase.
[REFACTOR] DatabaseController@findInTable optimised/simplified.

[FEATURE] Testing framework setup by @aaronsaray (see #44)
[FEATURE] You now see the table structure in an empty table (see #38)
[FEATURE] Dark mode by @James-N-M (see #36).
[FEATURE] Table scrollbar auto-hides when there is no overflow.
[FEATURE] Commands to install and update Prequel.
[FEATURE] Homepage now acts as a status page, keeping track of various things.
[FEATURE] Setting up separate browsing and managing modes.
- Added tab switch in the top-left to switch between Browse and Manage modes.
- Added new default query parameter that contains the current mode.
- Further functionality to be added.
[FEATURE] Prequel now uses it's own database instance with the config defined in config/prequel.php::database
[FEATURE] Pagination feature by @aaronsaray (see #26)

[FIX] #37, not all column values are showing up -> Caused by model's $hidden properties.
[FIX] Added extra error suggestions.
[FIX] Scrollbar appearing on the bottom of table view.
[FIX] With Prequel now using it's own config issues #23 #24 #29 are solved.
[FIX] Changed all config calls for database credentials.
[FIX] Style for PrequelError component now has a better layout + nice fa icon.
[FIX] Searching in table function was sending params the wrong way around.
[FIX] Added port to $dsn in DatabaseConnector.
[FIX] Number of records in table not showing.
[FIX] Fixed database connection credentials overlapping if too long. See #20.

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