Define more descriptive names for the tables

[oruebel]

We should use descriptive names for the tables that: 1) better communicate the intended use of the tables and 2) avoid overlap with terms used in the community that are ambiguous. Suggested names are:

1. intracellular_stimuli (new, see Add Stimulus and Reponse tables #31)
2. intracellular_responses (new, see Add Stimulus and Reponse tables #31)
3. intracellular_recordings (remain as is)
4. sweeps ---rename to---> simultaneous_recordings
5. sweep_sequence ---rename to---> sequential_recordings
6. runs ---rename to ---> repetitions
7. conditions ---rename to---> experimental_conditions

Also rename the columns

[lvsltz]

Also consider
6. runs ---rename to ---> repetitions

[oruebel]

Also consider runs ---rename to ---> repetitions

@lvsltz thanks for the suggestion. I agree, that term sounds much better. I'll update accordingly as I implement this issue.

[oruebel]

See also #27 which should be handled at the same time as this issue