Created searchable fields function.
Creating the query fields and adding new param.

Adding the open-text field parameter.
deleted file with typo.
mid-point of rewriting the query + field function

This rewriting allows for users to actually search for open-text
fields. It also gives the basis for much more scalability, by allowing
people to query particular fields with particular values.
Created validation tests and the url builder
Cleaned the redundant fieldX elements.
Writing documentation
cleaning the directory
Commuting Version 0.1.5
Committing Version 0.1.5
committing version 0.1.5
Merge pull request #35 from luiscape/field-to-param

Field to param implemented. Releasing version 0.1.5