Adds MGRS Support (#41)

Podfile

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+# Uncomment the next line to define a global platform for your project
+platform :ios, '15.0'
+
+target 'TAKTracker' do
+  # Comment the next line if you don't want to use dynamic frameworks
+  use_frameworks!
+
+  # Pods for TAKTracker
+  pod 'sf-ios', '~> 4.1.2'
+  pod 'color-ios', '~> 1.0.1'
+  pod 'grid-ios', '~> 1.0.5'
+  pod 'mgrs-ios', '~> 1.1.4'
+
+  target 'TAKTrackerTests' do
+    pod 'mgrs-ios', '~> 1.1.4'
+  end
+end

Podfile.lock

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+PODS:
+  - color-ios (1.0.1)
+  - grid-ios (1.0.5):
+    - color-ios (~> 1.0.1)
+    - sf-ios (~> 4.1.2)
+  - mgrs-ios (1.1.4):
+    - grid-ios (~> 1.0.5)
+  - sf-ios (4.1.2)
+
+DEPENDENCIES:
+  - color-ios (~> 1.0.1)
+  - grid-ios (~> 1.0.5)
+  - mgrs-ios (~> 1.1.4)
+  - sf-ios (~> 4.1.2)
+
+SPEC REPOS:
+  trunk:
+    - color-ios
+    - grid-ios
+    - mgrs-ios
+    - sf-ios
+
+SPEC CHECKSUMS:
+  color-ios: ab7521e896b4e061905d292aa7ff675d7e7f801d
+  grid-ios: 29d32ac8d78771b1d7a91ebeba85c5d49785c4bd
+  mgrs-ios: d96be2123562dbd99194bcdc75d54d8ac13afa3a
+  sf-ios: 16cfda9dd8971cb0216ac911840bb72727bf2397
+
+PODFILE CHECKSUM: dbd0a9268ba081e0455ceff020ce5b76d767b558
+
+COCOAPODS: 1.14.2