fixed read_table fxn for single-column tables
fixed erddap_tab_GET fxn to honor disk$overwrite=T
fixed erddap_table fxn to query fields with spaces
Merge pull request #68 from edweber/edchange

fixed read_table fxn for single-column tables
Merge pull request #69 from edweber/edchange2

fixed erddap_tab_GET fxn to honor disk$overwrite=T
Merge pull request #70 from edweber/edchange3

fixed erddap_table fxn to query fields with spaces
bumped date and patch version number