added Apache config settings
Refactored REST service to communicate with camelCase values
- data sent over the REST API should be camelcased
  * convert column names to camelCase for R (read) operations
  * convert camelCase attributes to column names for CUD operations
- added utility class error (for consistent error message structures)
- added utility class utils for case conversions and the assembling
  of columns/values for SQL statements
adapted frontend to modified REST API (see prev. commit)
- all properties coming over the REST API are now in JS syntax (camelCase)
- added function in app_server (REST service) to ignore additional fields,
  only process the defined attributes
added 'fields' attribute in /records REST API to filter for columns
added REST API parameter "field" to /projects also