Install heatmap0r filter

Format similarly to other plugins.

README.md

@@ -53,6 +53,10 @@ Stable frei0r releases are built automatically and made available on
 
 Frei0r sourcecode is released under the terms of the GNU General Public License and, eventually other compatible Free Software licenses.
 
+## Packaging
+
+[![Packaging status](https://repology.org/badge/vertical-allrepos/frei0r.svg?columns=3)](https://repology.org/project/frei0r/versions)
+
 ## Build dependencies 
 
 Frei0r can be built on GNU/Linux, M$/Windows and Apple/OSX platforms, possibly in even more environments like embedded devices.

src/filter/autothresh0ld/autothresh0ld.c

@@ -8,7 +8,7 @@
  * a more eye-soothing threshold effect as seen in ImageMagick.
  *
  * This has the added benefit that, whereas the sigmoidal filter's base
- * requires manual tuning, here it is determined algorithimically and thus
+ * requires manual tuning, here it is determined algorithmically and thus
  * can adapt on a frame-to-frame basis.
  *
  * This file is a Frei0r plugin.

src/filter/heatmap0r/CMakeLists.txt

@@ -6,6 +6,6 @@ if (MSVC)
 endif (MSVC)
 
 add_library (${TARGET} MODULE ${SOURCES})
-
-# No «lib» prefix (name.so instead of libname.so)
 set_target_properties (${TARGET} PROPERTIES PREFIX "")
+
+install (TARGETS ${TARGET} LIBRARY DESTINATION ${LIBDIR})

src/filter/heatmap0r/heatmap0r.c

@@ -96,7 +96,7 @@ void f0r_get_plugin_info(f0r_plugin_info_t* info)
     info->major_version = 0;
     info->minor_version = 1;
     info->num_params = 4;
-    info->explanation = "Performs a continious trichromatic tinting";
+    info->explanation = "Performs a continuous trichromatic tinting";
 }
 
 void f0r_get_param_info(f0r_param_info_t* info, int param_index)