Versioning (#568)

- removed getClientServerAPIVersion in server (not used)
- removed rxr side (clientversion compatibility check), removed enum as well as it is now done on the client side.
- versionAPI.h
   - GITBRANCH changed to RELEASE
   - dates for all API changed to "sem_version date". Scripts to compile servers modified for this. Empty "branch" name will end up with developer for sem_version.

- Version class with constructor taking in the long version (APILIB date). Other member functions including concise(to get sem_version for new releases and date for old releases), 
  
- bypassing initial tests, also now bypasses the client-rxr compatibility check (at rx_hostname command)

- previously, compatibility between client-det was ensuring both had the same detector API (eg. same APIJUNGFRAU)
   - Now, compatibility only checks APILIB (client side) and detector API(eg. APIJUNGFRAU) (detector side) have same major version. It only does backward compatibility test. Rest is upto user to ensure. 
   - If server is from an older release, it will compare dates like previous implementation (APIJUNGFRAU from both client and det)
 
- - previously, compatibility between client-rxr was ensuring both had the same APIRECEIVER
   - Now, compatibility only checks APILIB (client side) and APIRECEIVER (rxr side) have same major version. It only does backward compatibility test. Rest is upto user to ensure. 
   - If rxr is from an older release, it will compare dates like previous implementation (APIRECEIVER from both client and rxr)

- removed APIGUI, evalVersionVariables.sh, genVersionHeader.sh (not needed or not used)

- clientVersion, rxrversion and detectorserverversion all return strings and not integers (in hex) anymore. Depending if it has semantic versioning, it will print that or the date if it is too old.

- fixed in python (strings for versions)
- check_version function in detector server changed to "initial checks" as it only checks server-firmware compatibility and initial server checks. Client compatibilities are moved to client side.
- --version gives sem_version and date? Is date needed as well. The clientversion, detserverversion and rxrversion API gives only sem_version (no date)
- - formatting

slsDetectorGui/src/qDetectorMain.cpp

@@ -21,16 +21,25 @@
 #include <QScrollArea>
 #include <QSizePolicy>
 
+#include "sls/Version.h"
 #include <getopt.h>
 #include <string>
 #include <sys/stat.h>
 
+std::string getClientVersion() {
+    try {
+        sls::Version v(APILIB);
+        return v.concise();
+    } catch (...) {
+        return std::string("unknown");
+    }
+}
+
 int main(int argc, char **argv) {
 
     // options
     std::string fname;
     bool isDeveloper = false;
-    int64_t tempval = 0;
     int multiId = 0;
 
     // parse command line for config
@@ -72,9 +81,7 @@ int main(int argc, char **argv) {
             break;
 
         case 'v':
-            tempval = APIGUI;
-            LOG(sls::logINFO) << "SLS Detector GUI " << GITBRANCH << " (0x"
-                              << std::hex << tempval << ")";
+            LOG(sls::logINFO) << "SLS Detector GUI " << getClientVersion();
             return 0;
 
         case 'h':
@@ -463,10 +470,9 @@ void qDetectorMain::ExecuteHelp(QAction *action) {
         LOG(logINFO) << "About Common GUI for Jungfrau, Eiger, Mythen3, "
                         "Gotthard, Gotthard2 and Moench detectors";
 
-        std::string guiVersion = ToStringHex(APIGUI);
         std::string clientVersion = "unknown";
         try {
-            clientVersion = ToStringHex(det->getClientVersion());
+            clientVersion = det->getClientVersion();
         }
         CATCH_DISPLAY("Could not get client version.",
                       "qDetectorMain::ExecuteHelp")
@@ -475,9 +481,8 @@ void qDetectorMain::ExecuteHelp(QAction *action) {
             qDefs::INFORMATION,
             "<p style=\"font-family:verdana;\">"
 
-            "<b>SLS Detector GUI version:&nbsp;&nbsp;&nbsp;" +
-                guiVersion +
-                "<br>SLS Detector Client version:  " + clientVersion +
+            "<b>SLS Detector Client version:  " +
+                clientVersion +
                 "</b><br><br>"
 
                 "Common GUI to control the SLS Detectors: "