Merge dev/0.6.5 branch into master ahead of release

[clrcrl]

I wanted to move every non-breaking change into a patch release, so that people could upgrade easily without needing to go to 0.20.0. I think this is going to take some of the pressure of the 0.7.0 release.

As part of this cleanup, I also squashed the separate commits from PRs into one single commit, to make this history seem much cleaner.

Once merged and released, I'm going to rebased dev/0.7.0 onto this branch, and clean up the commits that I'm keeping on there. That should put us in great shape to focus on the 0.20.0 changes

Here's the summary of commits that were on the dev/0.7.0 branch, and where I've now represented them :)

original commit hash	description	now part of:	new commit hash	reason
2e3a343	Create accepted_range test	0.6.5	3d61f89	Non-breaking feature
6ce6c4d	Add integration tests	0.6.5	3d61f89	Non-breaking feature
caa4ca2	Add accepted_range documentation	0.6.5	3d61f89	Non-breaking feature
70b528a	Fixing invalid yaml in readme	0.6.5	3d61f89	Non-breaking feature
3ceb9ae	Add missing columns: entry	0.6.5	3d61f89	Non-breaking feature
163251d	Update changelog for dev/0.7.0	n/a	n/a
6e934d7	Added extension to the unique_combination_of_columns schema test in order to support a WHERE arg	dropped		We get where for free in 0.20.0
0cd7ade	Added ability to use expression_is_true as a column test	0.6.5	9d9e720	Non-breaking feature
e5dd0b1	Tidy up Jinja	0.6.5	9d9e720	Non-breaking feature
db44ad3	Update changelog	0.6.5	9d9e720	Non-breaking feature
171970e	Allow aliasing individual columns from star macro.	dropped		General opinion on whether to add complexity to existing macros has changed
edf40bf	Fix failing test	dropped		General opinion on whether to add complexity to existing macros has changed
e590ebb	Update changelog [ci skip]	dropped		General opinion on whether to add complexity to existing macros has changed
bc80c65	Adding some logic to handle unpivoting boolean columns	0.6.5	d4779ca	Fix
7c1082d	Readme & deleted the 'remove' line which does nothing.	0.6.5	d4779ca	Fix
f67875f	Finish off upivot boolean logic	0.6.5	d4779ca	Fix
3f477bb	Update changelog [ci skip]	0.6.5	d4779ca	Fix
10bf540	Schema Test - Not accepted values	0.6.5	0101a7e	Non-breaking feature
689707d	Schema Test - Not accepted values test fixed	0.6.5	0101a7e	Non-breaking feature
a3f75be	empty lines at the end	0.6.5	0101a7e	Non-breaking feature
f60eebc	Changelog	0.6.5	0101a7e	Non-breaking feature
949d40d	Add zero length option to exclusive range test.	0.6.5	63314f6	Non-breaking feature
fb0fa0f	Use boolean for zero range arg.	0.6.5	63314f6	Non-breaking feature
5450b71	Fix aliases default arg	dropped		was related to above change to star macro
4554198	Add fewer_rows_then schema test	0.6.5	e7f02ea	Non-breaking feature
b3a7b0e	Allow star macro to be case insensitive. Improve docs while we're here. (#348)	dropped		General opinion on whether to add complexity to existing macros has changed
c304881	Add order_by argument to get_column_values (#349)	0.7.0	TODO	Breaking feature (change of arg order)
dd7e24c	Postgres also have an alternative concat binary operation (#296)	0.7.0	TODO	Potential breaking feature for spark utils
b35f7ed	Sequential values v2 (#327)	0.6.5	efc00b	Non-breaking feature
8fb77b1	Add slugify macro to utils	0.7.0	TODO	Breaking feature (requires dbt 0.19.0 for re module)
603e867	Remove unnecessary parens from pivot macro	0.7.0	TODO	Breaking feature (requires dbt 0.19.0 for re module)
14fff40	Handle external tables in get_tables_by_pattern_sql (#351)	0.6.5	6932957	Fix
7c6de17	support quarter in postgres last day (#333)	0.6.5	4f9e717	Fix
56ef1d2	Fix cardinality test error (#334)	0.6.5	8bb8cef	Fix
049974c	Markdown fixes to fix rendering on hub (#336)	0.6.5	acdd030	Quality of life
f4ef848	Add unit argument to haversine distnace macro	0.6.5	01e9655	Non-breaking feature
09abb04	Update readme and changelog (#361)	0.6.5	5c84f17	Quality of life
3a4da56	Small tidy to docs (#363)	0.6.5	5c84f17	Quality of life

[jtcohen6]

Amazing description + commit history! I know these changes have been combed through a few times now.