Fix for remap==False

[jhamman]

allow remap==False if grid resolution matches but domain grid and routing grid are not identical, raises error if resolutions do not match

fixes #36

[landscape-bot]

Repository health decreased by 0.15% when pulling 0da8b15 on jhamman:feature/fix_remap_false into a9c1bdf on UW-Hydro:develop.

• 2 new problems were found (including 0 errors and 2 code smells).
• 1 problem was fixed (including 0 errors and 1 code smell).

[landscape-bot]

Repository health decreased by 0.15% when pulling 3cd16e4 on jhamman:feature/fix_remap_false into a9c1bdf on UW-Hydro:develop.

• 2 new problems were found (including 0 errors and 2 code smells).
• 1 problem was fixed (including 0 errors and 1 code smell).

[landscape-bot]

Repository health increased by 0.18% when pulling 51a775d on jhamman:feature/fix_remap_false into a9c1bdf on UW-Hydro:develop.

• No new problems were introduced.
• 1 problem was fixed (including 0 errors and 1 code smell).

[jhamman]

@bartnijssen, this is ready to merge.

[landscape-bot]

Repository health increased by 0.18% when pulling 3cb4048 on jhamman:feature/fix_remap_false into a9c1bdf on UW-Hydro:develop.

• No new problems were introduced.
• 1 problem was fixed (including 0 errors and 1 code smell).