Add changelog file

CHANGELOG.md

+# Beam Current Monitor module CHANGELOG
+
+## 0.9.12
+- [ PBIBCM-209 ](https://jira.esss.lu.se/browse/PBIBCM-209)  Extend options of Trigger Source PVs
+- [ PBIBCM-143 ](https://jira.esss.lu.se/browse/PBIBCM-143)  Add Leaky Integrator
+- [ PBIBCM-213 ](https://jira.esss.lu.se/browse/PBIBCM-213)  Fix timestamp discrepancy
+- [ PBIBCM-215 ](https://jira.esss.lu.se/browse/PBIBCM-215)  Add autosave to LUT PVs (+ changes on st.cmd file)
+- [ ICSHWI-9569](https://jira.esss.lu.se/browse/ICSHWI-9569) Fix error log on setting AdcScale with auto calibration
+- [ PBIBCM-211 ](https://jira.esss.lu.se/browse/PBIBCM-211)  Fiber Optic PVs
+- [ PBIBCM-217 ](https://jira.esss.lu.se/browse/PBIBCM-217)  Flattop ROI automatic mode
+- [ PBIBCM-227 ](https://jira.esss.lu.se/browse/PBIBCM-227)  Fix Droop Rate and Adc Scale calculation
+- [ PBIBCM-225 ](https://jira.esss.lu.se/browse/PBIBCM-225)  Fix AlarmControl PV issue
+- [ PBIBCM-228 ](https://jira.esss.lu.se/browse/PBIBCM-228)  Add auxiliary upper/lower/hysteresis threshold PVs
+- [ PBIBCM-223 ](https://jira.esss.lu.se/browse/PBIBCM-223)  Add beam absence signals per ACCT channel
+
+## 0.9.11
+- [ PBIBCM-146 ](https://jira.esss.lu.se/browse/PBIBCM-146)  Add crate ID PV
+- [ PBIBCM-152 ](https://jira.esss.lu.se/browse/PBIBCM-152)  Auto-calibrator
+- [ PBIBCM-200 ](https://jira.esss.lu.se/browse/PBIBCM-200)  Remove restricted access from ROI PVs
+- [ PBIBCM-201 ](https://jira.esss.lu.se/browse/PBIBCM-201)  Define more discrete signals on probe channel 4
+- [ PBIBCM-206 ](https://jira.esss.lu.se/browse/PBIBCM-206)  Add pulse width filter length PV
+- [ PBIBCM-207 ](https://jira.esss.lu.se/browse/PBIBCM-207)  Independent beam exist threshold for each channel 		
+
+## 0.9.10
+- [ PBIBCM-195 ](https://jira.esss.lu.se/browse/PBIBCM-195)  Add BeamOverThreshold PV as critical
+- [ ICSHWI-5688](https://jira.esss.lu.se/browse/ICSHWI-5688) Remove NumSamples per channel from autosave
+
+## 0.9.9
+- [ PBIBCM-189 ](https://jira.esss.lu.se/browse/PBIBCM-189)  Add LUT PVs for MinTriggerPeriod  
+- [ PBIBCM-190 ](https://jira.esss.lu.se/browse/PBIBCM-190)  Add ACCT beam exists PVs
+
+## 0.9.8
+- [ PBIBCM-188 ](https://jira.esss.lu.se/browse/PBIBCM-188)  Fix MinTriggerPeriod readback parameter type 
+
+## 0.9.7
+- [ PBIBCM-185 ](https://jira.esss.lu.se/browse/PBIBCM-185)  Add High Voltage Presence and OK signals
+ 
+## 0.9.6
+- [ CAP-26     ](https://jira.esss.lu.se/browse/CAP-26)      Add access security
+
+## 0.9.5
+- [ PBIBCM-183 ](https://jira.esss.lu.se/browse/PBIBCM-183)  Update minimum value of MinTriggerPeriod
+
+## 0.9.4
+- [ PBIBCM-178 ](https://jira.esss.lu.se/browse/PBIBCM-178)  Update resolution of trigger repetition rate threshold
+
+## 0.9.3
+- [ PBIBCM-174 ](https://jira.esss.lu.se/browse/PBIBCM-174)  Update measured trigger width window to 32-bit
+